feat(regionserver): add graceful shutdown configuration #1745

Job	Run time
Check if committed README is the one we would render from the available parts	19s
Run Cargo Deny (advisories)	41s
Run Clippy	28s
Run Cargo Deny (bans licenses sources)	40s
Check if committed Helm charts are up to date	47s
Run RustDoc	1m 10s
Run Rustfmt	11s
Run Cargo Udeps	1m 24s
Run Cargo Tests	34s
Select target helm repository based on action trigger	1s
All tests passed	1s
Package Charts, Build Docker Image and publish them - ubuntu-latest	10m 24s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	9m 11s
Build and publish manifest list	41s
Run the OpenShift Preflight check on the published images	12s
	26m 44s

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