fix: support DELETE configs validation #7290

Job	Run time
Test Gator	3m 27s
[Helm] Build and Test (3.7.2, gatekeeper-system)	7m 4s
Check codegen and manifest	2m 52s
[Helm] Build and Test (3.7.2, custom-namespace)	7m 48s
Build and Test (1.25.8)	10m 41s
Lint	1m 2s
Build and Test (1.26.3)	9m 31s
Unit test	9m 48s
Build and Test (1.27.1)	10m 1s
Build and Test (1.28.0)	11m 1s
[Generator Resource Expansion] Build and Test	9m 8s
[Trivy] Scan for vulnerabilities	3m 8s
	1h 25m 31s

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