feat(regionserver): add graceful shutdown configuration (#570) #1969

Job	Run time
Run Cargo Deny (advisories)	50s
Run Cargo Deny (bans licenses sources)	52s
Run Clippy	1m 45s
Run Rustfmt	12s
Run Cargo Udeps	2m 0s
Select target helm repository based on action trigger	1s
Check if committed Helm charts are up to date	1m 55s
Check if committed README is the one we would render from the available parts	25s
Run RustDoc	3m 6s
Run Cargo Tests	1m 24s
All tests passed	1s
Package Charts, Build Docker Image and publish them - ubuntu-latest	6m 15s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	5m 17s
Build and publish manifest list	0s
Run the OpenShift Preflight check on the published images	0s
	24m 3s

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