Create determinePersistentVolumeHealth

[sanposhiho]

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #356

Does this PR introduce a user-facing change?:

NONE

[pipecd-bot]

Code coverage for golang is 33.77%. This pull request decreases coverage by -0.04%.

File	Function	Base	Head	Diff
pkg/app/piped/cloudprovider/kubernetes/state.go	determinePersistentVolumeHealth	0.00%	0.00%	+0.00%

[nakabonne]

Yes, PersistentVolume.Status has its own Message, so we don't have to make a message for each status. Thank you!
/lgtm

[khanhtc1202]

thank you
/approve

[pipecd-bot]

This pull request is APPROVED by khanhtc1202.

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