feat: support multiple sync sources #6888

Job	Run time
Unit test	8m 1s
Unit test	8m 1s
Lint	1m 9s
Lint	1m 9s
Build and Test (1.24.12)	8m 54s
Build and Test (1.24.12)	8m 54s
Build and Test (1.25.8)	15m 9s
Build and Test (1.25.8)	10m 7s
Build and Test (1.26.3)	8m 40s
Build and Test (1.26.3)	8m 40s
Build and Test (1.27.1)	9m 12s
Build and Test (1.27.1)	9m 12s
[Generator Resource Expansion] Build and Test	11m 9s
[Generator Resource Expansion] Build and Test	11m 9s
Test Gator	3m 55s
Test Gator	3m 55s
[Helm] Build and Test (3.7.2, gatekeeper-system)	7m 2s
[Helm] Build and Test (3.7.2, gatekeeper-system)	7m 2s
[Helm] Build and Test (3.7.2, custom-namespace)	7m 33s
[Helm] Build and Test (3.7.2, custom-namespace)	7m 33s
[Trivy] Scan for vulnerabilities	3m 2s
[Trivy] Scan for vulnerabilities	3m 2s
Check codegen and manifest	2m 25s
Check codegen and manifest	2m 25s
	2h 47m 20s

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