Update VRG manifest work when drcluster is deleted #1661

Job	Run time
Build image	3m 28s
drenv tests (3.9)	1m 26s
Linters	1m 25s
Golangci Lint	33s
drenv tests (3.10)	1m 35s
ramenctl tests (3.9)	15s
drenv tests (3.11)	2m 2s
Unit tests	6m 34s
ramenctl tests (3.10)	17s
ramenctl tests (3.11)	35s
Check artifacts and operator deployment (1.20.7)	2m 16s
Publish built image	1m 8s
	21m 34s

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