Drop support for Bazel 7 #7051

Job	Run time
WebAssembly	35s
pre_ci / pre_ci	5s
Clang Tidy	0s
Reindeer	0s
Bazel on ${{ (((matrix.os == 'ubuntu') && 'Linux') \|\| ((matrix.os == 'macos') && 'macOS') \|\| ((matrix.os == 'windows') && 'Windows') \|\| '???') }}	0s
Clippy	0s
ESLint	-1s
Outdated	-1s
Emscripten	-1s
Documentation	-1s
matrix.name \|\| format('Rust {0}', matrix.rust)	-1s
Minimal versions	-1s
	34s

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