feat: use RELATED_IMAGES_ environment variables to configure operand's images #3411

Job	Run time
Build-operator	5m 12s
Build-bundle-image	59s
Build-tuftool	5m 19s
Build-fbc	3m 13s
Execute securesign/sigstore-e2e	6m 14s
Test with custom operator installation	8m 7s
Test upgrade operator	18m 29s
Test EKS deployment	0s
Test kind deployment	29m 59s
	1h 17m 32s

Provide feedback