Update blst to 0.3.11 (#4624) #13302

Job	Run time
cargo-fmt	14s
extract-msrv	5s
compile-with-beta-compiler	31m 20s
target-branch-check	0s
beacon-chain-tests	14m 40s
release-tests-windows	25m 13s
slasher-tests	4m 47s
op-pool-tests	23m 9s
release-tests-ubuntu	13m 33s
debug-tests-ubuntu	18m 11s
state-transition-vectors-ubuntu	14m 42s
check-benchmarks	6m 42s
check-msrv	8m 1s
dockerfile-ubuntu	33m 31s
clippy	8m 43s
doppelganger-protection-test	53m 31s
ef-tests-ubuntu	12m 36s
eth1-simulator-ubuntu	39m 31s
execution-engine-integration-ubuntu	21m 44s
merge-transition-ubuntu	44m 3s
no-eth1-simulator-ubuntu	38m 28s
syncing-simulator-ubuntu	44m 8s
arbitrary-check	1m 37s
cargo-audit	4m 25s
cargo-udeps	17m 46s
cargo-vendor	41s
	8h 1m 21s

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