chore: bump rust version to 1.81 #11774

Job	Run time
Bazel Test All	33m 34s
Bazel Test All	15m 51s
Bazel Build All Config Check	9m 42s
Bazel Build All Config Check	9m 42s
Bazel Test macOS Intel	0s
Bazel Test macOS Intel	0s
Bazel Build Fuzzers	3m 50s
Bazel Build Fuzzers	3m 50s
Bazel Build Fuzzers AFL	4m 6s
Bazel Build Fuzzers AFL	4m 6s
Build IC	17m 6s
Build IC	17m 6s
Cargo Clippy Linux	5m 0s
Cargo Clippy Linux	5m 0s
Python CI Tests	1m 24s
Python CI Tests	1m 24s
Cargo Build Release Linux	7m 28s
Cargo Build Release Linux	7m 28s
Build Determinism	0s
Build Determinism (//publish/binaries:upload, release, build-ic/release, false)	15s
Build Determinism (//publish/canisters:upload, canisters, build-ic/canisters, false)	18s
Build Determinism (//ic-os/guestos/envs/prod:upload_disk-img, guest-os/update-img, build-ic/icos/...	15s
Build Determinism (//ic-os/hostos/envs/prod:upload_update-img, host-os/update-img, build-ic/icos/...	16s
Build Determinism (//ic-os/setupos/envs/prod:upload_disk-img, setup-os/disk-img, build-ic/icos/se...	16s
	2h 27m 57s

Provide feedback