fix: Enable realtime metric gc after its workflow is completed. Fixes… #21696

Job	Run time
argo-images (argoexec)	3m 5s
argo-images (argocli)	3m 16s
Get changed files	5s
Unit Tests	4m 27s
Lint	4m 16s
Windows Unit Tests	11m 5s
Codegen	0s
UI	0s
E2E Tests (test-executor, minimal)	13m 16s
E2E Tests (test-corefunctional, minimal)	12m 43s
E2E Tests (test-functional, minimal)	20m 17s
E2E Tests (test-api, mysql)	6m 59s
E2E Tests (test-cli, mysql)	12m 33s
E2E Tests (test-cron, minimal)	6m 37s
E2E Tests (test-examples, minimal)	6m 8s
E2E Tests (test-plugins, plugins)	3m 45s
E2E Tests (test-java-sdk, minimal)	3m 41s
E2E Tests (test-python-sdk, minimal)	3m 22s
E2E Tests (test-executor, v1.26.15+k3s1, minimal)	14m 13s
E2E Tests (test-corefunctional, v1.26.15+k3s1, minimal)	13m 46s
E2E Tests (test-functional, v1.26.15+k3s1, minimal)	21m 45s
E2E Tests - Composite result	1s
	2h 45m 20s

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