build

acc: Introduce phases; speed up "test-update" 2x. #23980

Job	Run time
testmask	28s
cleanups	2s
integration-trigger-dependabot	0s
validate-generated-is-up-to-date	44s
validate-python-codegen	14s
integration-trigger	8s
make test (macos, terraform)	12m 27s
make test (windows, terraform)	14m 12s
make test (linux, terraform)	9m 47s
make test (linux, direct)	5m 35s
make test (windows, direct)	8m 39s
make test (macos, direct)	7m 12s
make test-exp-aitools	0s
make test-exp-ssh	0s
make test-pipelines	0s
test-result	3s
	59m 31s

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