feat: upgrade checkout action to v4 in GitHub workflows #7706

Job	Run time
compile-accounts	41s
compile-app	43s
compile-common	58s
compile-home	39s
compile-isolated-vm	34s
compile-worker	41s
compile-workflow	40s
compile-admin-dashboard	52s
compile-api-reference	37s
compile-copilot	36s
compile-dashboard	1m 9s
compile-docs-reference	39s
compile-e2e	34s
compile-fluent-ingest	38s
compile-incoming-request-ingest	39s
compile-infrastructure-agent	18s
compile-nginx	35s
compile-open-telemetry-ingest	37s
compile-probe	35s
compile-probe-ingest	40s
compile-status-page	43s
compile-test-server	34s
	14m 42s

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