Looks like fuzzing is failing permanently again

Seems to be a mismatch between nightly compiler and `serde`.

````
EAD is now at a4b82c7 Merge 1757377 into b3ff033
.
2024-08-22 20:17:48,714 - root - INFO - repo_dir: /github/workspace/storage/gitoxide.
2024-08-22 20:17:48,719 - root - INFO - Docker container: 79524d8df2a2.
2024-08-22 20:17:48,720 - root - INFO - Building with address sanitizer.
2024-08-22 20:17:48,720 - helper - INFO - Running: docker run --privileged --shm-size=2g --platform linux/amd64 --rm -e FUZZING_ENGINE=libfuzzer -e CIFUZZ=True -e SANITIZER=address -e ARCHITECTURE=x86_64 -e FUZZING_LANGUAGE=rust -e OUT=/github/workspace/build-out --volumes-from 79524d8df2a2 gcr.io/oss-fuzz/gitoxide /bin/bash -c 'cd / && rm -rf /src/gitoxide/* && cp -r /github/workspace/storage/gitoxide /src && cd - && compile'.
/src/gitoxide
---------------------------------------------------------------
vm.mmap_rnd_bits = 28
Compiling libFuzzer to /usr/lib/libFuzzingEngine.a...  done.
---------------------------------------------------------------
CC=clang
CXX=clang++
CFLAGS=-O1 -fno-omit-frame-pointer -gline-tables-only -Wno-error=enum-constexpr-conversion -Wno-error=incompatible-function-pointer-types -Wno-error=int-conversion -Wno-error=deprecated-declarations -Wno-error=implicit-function-declaration -Wno-error=implicit-int -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION -fsanitize=address -fsanitize-address-use-after-scope -fsanitize=fuzzer-no-link
CXXFLAGS=-O1 -fno-omit-frame-pointer -gline-tables-only -Wno-error=enum-constexpr-conversion -Wno-error=incompatible-function-pointer-types -Wno-error=int-conversion -Wno-error=deprecated-declarations -Wno-error=implicit-function-declaration -Wno-error=implicit-int -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION -fsanitize=address -fsanitize-address-use-after-scope -fsanitize=fuzzer-no-link -stdlib=libc++
RUSTFLAGS=--cfg fuzzing -Zsanitizer=address -Cdebuginfo=1 -Cforce-frame-pointers
---------------------------------------------------------------
+ set -eox pipefail
+ export CARGO_BUILD_TARGET_DIR=/work/shared_cache
+ CARGO_BUILD_TARGET_DIR=/work/shared_cache
+++ readlink -f '{}'
++ find . -type d -name fuzz -exec dirname '/src/gitoxide/{}' ';'
+ FUZZ_CRATE_DIRS='/src/gitoxide/./gix-commitgraph
/src/gitoxide/./gix-revision
/src/gitoxide/./gix-refspec
/src/gitoxide/./gix-pathspec
/src/gitoxide/./gix-object
/src/gitoxide/./gix-ref
/src/gitoxide/./gix-attributes
/src/gitoxide/./gix-config
/src/gitoxide/./gix-config-value
/src/gitoxide/./gix-url
/src/gitoxide/./gix-date'
+ for CRATE_DIR in ${FUZZ_CRATE_DIRS[@]}
+ echo 'Building crate: /src/gitoxide/./gix-commitgraph'
+ cd /src/gitoxide/./gix-commitgraph
+ cargo fuzz build -O --debug-assertions
Building crate: /src/gitoxide/./gix-commitgraph
    Updating crates.io index
 Downloading crates ...
  Downloaded derive_arbitrary v1.3.2
  Downloaded arbitrary v1.3.2
  Downloaded jobserver v0.1.32
  Downloaded faster-hex v0.9.0
  Downloaded shlex v1.3.0
  Downloaded thiserror-impl v1.0.63
  Downloaded thiserror v1.0.63
  Downloaded unicode-ident v1.0.12
  Downloaded memchr v2.7.4
  Downloaded syn v2.0.75
  Downloaded bstr v1.10.0
  Downloaded libc v0.2.158
  Downloaded libfuzzer-sys v0.4.7
  Downloaded serde v1.0.208
  Downloaded quote v1.0.36
  Downloaded proc-macro2 v1.0.86
  Downloaded memmap2 v0.9.4
  Downloaded cc v1.1.13
  Downloaded sha1_smol v1.0.1
  Downloaded once_cell v1.19.0
  Downloaded anyhow v1.0.86
   Compiling proc-macro2 v1.0.86
   Compiling libc v0.2.158
   Compiling unicode-ident v1.0.12
   Compiling serde v1.0.208
   Compiling thiserror v1.0.63
   Compiling shlex v1.3.0
error[E0658]: `#[diagnostic]` attribute name space is experimental
   --> /rust/registry/src/index.crates.io-6f17d22bba15001f/serde-1.0.208/src/de/mod.rs:537:5
    |
537 |     diagnostic::on_unimplemented(
    |     ^^^^^^^^^^
    |
    = note: see issue #111996 <rust-lang/rust#111996> for more information
    = help: add `#![feature(diagnostic_namespace)]` to the crate attributes to enable
    = note: this compiler was built on 2024-02-11; consider upgrading it if it is out of date

error[E0658]: `#[diagnostic]` attribute name space is experimental
   --> /rust/registry/src/index.crates.io-6f17d22bba15001f/serde-1.0.208/src/ser/mod.rs:220:5
    |
220 |     diagnostic::on_unimplemented(
    |     ^^^^^^^^^^
    |
    = note: see issue #111996 <rust-lang/rust#111996> for more information
    = help: add `#![feature(diagnostic_namespace)]` to the crate attributes to enable
    = note: this compiler was built on 2024-02-11; consider upgrading it if it is out of date

   Compiling quote v1.0.36
   Compiling syn v2.0.75
   Compiling jobserver v0.1.32
   Compiling cc v1.1.13
   Compiling memchr v2.7.4
For more information about this error, try `rustc --explain E0658`.
The following warnings were emitted during compilation:

warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag
warning: serde@1.0.208: cargo:rustc-check-cfg requires -Zcheck-cfg flag

error: could not compile `serde` (lib) due to 2 previous errors
warning: build failed, waiting for other jobs to finish...
Error: failed to build fuzz script: ASAN_OPTIONS="detect_odr_violation=0" RUSTFLAGS="-Cpasses=sancov-module -Cllvm-args=-sanitizer-coverage-level=4 -Cllvm-args=-sanitizer-coverage-inline-8bit-counters -Cllvm-args=-sanitizer-coverage-pc-table -Cllvm-args=-sanitizer-coverage-trace-compares --cfg fuzzing -Clink-dead-code -Zsanitizer=address -Cllvm-args=-sanitizer-coverage-stack-depth -Cdebug-assertions -C codegen-units=1 --cfg fuzzing -Zsanitizer=address -Cdebuginfo=1 -Cforce-frame-pointers" "cargo" "build" "--manifest-path" "/src/gitoxide/gix-commitgraph/fuzz/Cargo.toml" "--target" "x86_64-unknown-linux-gnu" "--release" "--config" "profile.release.debug=true" "--bins"
2024-08-22 20:17:58,803 - root - ERROR - Building fuzzers failed.
2024-08-22 20:17:58,803 - root - ERROR - Error building fuzzers for (commit: a4b82c7, pr_ref: refs/pull/1536/merge).
````