Rust

Update Bazel to v7.6.1. #2536

Job	Run time
bazel	5m 57s
licenses	12s
audit	10s
examples (hello_world)	15s
examples (http_config)	25s
examples (http_body)	18s
examples (http_auth_random)	27s
examples (http_headers)	24s
stable	38s
reactors (http_auth_random)	25s
reactors (http_body)	25s
reactors (http_headers)	26s
nightly	58s
examples (envoy_filter_metadata)	22s
examples (grpc_auth_random)	15s
reactors (http_config)	25s
reactors (grpc_auth_random)	26s
outdated	14s
reactors (hello_world)	26s
msrv	3m 16s
reactors (envoy_filter_metadata)	30s
	16m 54s

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