[WIP] Build against tf2.14 bazel strategy #6166

Job	Run time
Black Python code format	19s
Flake8	18s
Check that we can build the docs	2m 21s
Bazel code format	14s
Clang C++ code format	13s
Notebook format	12s
Check that the pre-commit works	1m 13s
Check that the source code is compliant	1m 15s
Run the cpu tests in a small python docker image	18m 40s
Fast build to run python-only tests	6m 46s
Valid build files	2m 45s
Notebook lint	13s
	34m 29s

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