Update MSRV to Rust 1.79

[emilk]

What

• Required for More native Video support #7298

TODO

• Fix the debug-assertion
• Fix all new clippy lints
• Add more clippy lints thats been added in 1.77, 1.78, 1.79

MiMalloc bug

Debug assertions are now part of stdlib: https://blog.rust-lang.org/2024/05/02/Rust-1.78.0.html#asserting-unsafe-preconditions, making us hit this bug in MiMalloc:

• mimalloc returns non-aligned memory purpleprotocol/mimalloc_rust#128

I also opened this issue on the standard library:

• Suggestion: debug-assert that the allocator returns aligned memory rust-lang/rust#131189

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using examples from latest main build: rerun.io/viewer
  • Using full set of examples from nightly build: rerun.io/viewer
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
• If applicable, add a new check to the release checklist!
• If have noted any breaking changes to the log API in CHANGELOG.md and the migration guide

• PR Build Summary
• Recent benchmark results
• Wasm size tracking

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[github-actions]

Deployed docs

Commit	Link
531d9b7	https://landing-l5lrpxwz7-rerun.vercel.app/docs

[Wumpf]

lgtm. Scary crash. Tried it as well and repros on Mac M1. Want to give it a spin on Windows x64

I got the crash on the second thing it wants to call collect on

I got curious about this crash and enabled the crashy bool.  It actually passes one for me and then fails on the first:
```[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:141:17] std::any::type_name::<T>() = "re_renderer::global_bindings::FrameUniformBuffer"
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:142:17] std::mem::size_of::<T>() = 256
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:143:17] std::mem::align_of::<T>() = 256
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:144:17] vec.len() = 1
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:145:17] vec.as_ptr() = 0x000004d5dc085f00
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:146:17] vec.as_ptr() as usize % std::mem::align_of::<T>() = 0
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:147:17] vec.as_slice().len() = 1
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:141:17] std::any::type_name::<T>() = "re_renderer::renderer::compositor::gpu_data::CompositeUniformBuffer"
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:142:17] std::mem::size_of::<T>() = 256
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:143:17] std::mem::align_of::<T>() = 256
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:144:17] vec.len() = 1
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:145:17] vec.as_ptr() = 0x000004d5dc081180
[crates/viewer/re_renderer/src/allocator/cpu_write_gpu_read_belt.rs:146:17] vec.as_ptr() as usize % std::mem::align_of::<T>() = 128

thread 'main' panicked at 'unsafe precondition(s) violated: slice::from_raw_parts requires the pointer to be aligned and non-null, and the total size of the slice not to exceed `isize::MAX`'

... only that I actually get incorrect alignment.
edit: Same on Windows.

that's a bit worrisome