Rust

Update Bazel to v7.6.1. (#315) #2537

Job	Run time
nightly	58s
audit	11s
stable	37s
outdated	10s
bazel	5m 47s
licenses	15s
examples (http_auth_random)	22s
examples (hello_world)	13s
examples (http_body)	13s
examples (http_config)	14s
examples (envoy_filter_metadata)	15s
examples (http_headers)	19s
examples (grpc_auth_random)	17s
msrv	3m 21s
reactors (http_auth_random)	22s
reactors (http_body)	25s
reactors (grpc_auth_random)	25s
reactors (http_config)	25s
reactors (hello_world)	24s
reactors (http_headers)	26s
reactors (envoy_filter_metadata)	23s
	16m 2s

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