build

Make validation steps optional to fix appkit caching breaking npm ins… #21297

Job	Run time
cleanups	2s
testmask	21s
validate-generated-is-up-to-date	1m 6s
validate-python-codegen	10s
make test-exp-aitools (macos-latest)	1m 7s
integration-trigger	6s
make test-exp-aitools (ubuntu-latest)	31s
make test (${{ matrix.os.name }}, ${{ matrix.deployment }})	0s
make test-exp-ssh	0s
make test-pipelines	0s
test-result	3s
	3m 26s

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