Add retry on Delete silence #8435

Job	Run time
lint	3m 43s
lint	3m 43s
build	3m 57s
build	3m 57s
CodeQL	10m 19s
CodeQL	10m 19s
test	21m 11s
test	21m 11s
integration-configs-db	2m 2s
integration-configs-db	2m 2s
integration (requires_docker)	5m 38s
integration (requires_docker)	5m 38s
integration (integration_alertmanager)	3m 50s
integration (integration_alertmanager)	4m 3s
integration (integration_backward_compatibility)	7m 28s
integration (integration_backward_compatibility)	7m 28s
integration (integration_memberlist)	7m 32s
integration (integration_memberlist)	7m 32s
integration (integration_querier)	13m 11s
integration (integration_querier)	13m 11s
integration (integration_ruler)	3m 53s
integration (integration_ruler)	3m 53s
integration (integration_query_fuzz)	1m 45s
integration (integration_query_fuzz)	1m 45s
deploy	0s
deploy	0s
deploy_website	0s
deploy_website	0s
	2h 49m 11s

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