build

Pin Alpine image digest and add SHA256 verification for TF provider #24207

Job	Run time
cleanups	3s
integration-trigger-dependabot	-1s
testmask	25s
validate-generated-is-up-to-date	43s
validate-python-codegen	11s
integration-trigger	8s
make test (linux, terraform)	11m 22s
make test (macos, direct)	9m 50s
make test (macos, terraform)	14m 12s
make test (windows, terraform)	16m 19s
make test (windows, direct)	11m 27s
make test-pipelines	0s
make test (linux, direct)	5m 30s
make test-exp-ssh	0s
make test-exp-aitools	0s
test-result	3s
	1h 10m 12s

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