chore: bump rust to 1.77.2 #1212

Job	Run time
verify-bcr-patches	3s
test-release	15s
test / matrix-prep-os	1s
test / matrix-prep-bazelversion	3s
test / test (ubuntu-latest, 7.0.2, ., false)	7m 20s
test / test (ubuntu-latest, 7.0.2, e2e/smoke, true)	5m 34s
test / test (ubuntu-latest, 7.0.2, e2e/smoke, false)	2m 31s
test / test (ubuntu-latest, 7.0.2, e2e/repository-rule-deps, true)	5m 17s
test / test (ubuntu-latest, 7.0.2, e2e/system-interpreter, true)	5m 11s
test / test (ubuntu-latest, 6.4.0, e2e/smoke, true)	5m 22s
test / test (ubuntu-latest, 6.4.0, e2e/smoke, false)	2m 34s
test / test (ubuntu-latest, 6.4.0, e2e/repository-rule-deps, true)	5m 25s
test / test (ubuntu-latest, 6.4.0, e2e/system-interpreter, true)	5m 37s
	45m 13s

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