build

Pin Alpine image digest and add SHA256 verification for TF provider #24205

Job	Run time
cleanups	3s
testmask	30s
integration-trigger-dependabot	0s
validate-python-codegen	13s
validate-generated-is-up-to-date	46s
integration-trigger	8s
make test (macos, terraform)	13m 26s
make test (macos, direct)	8m 52s
make test (windows, terraform)	15m 59s
make test (linux, direct)	6m 26s
make test (linux, terraform)	10m 45s
make test (windows, direct)	9m 26s
make test-exp-aitools	0s
make test-pipelines	0s
make test-exp-ssh	0s
test-result	3s
	1h 6m 37s

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