OCPVE-605: Allow recovering from existing volume groups

[suleymanakbas91]

This PR allows LVMS to pick up and use an existing volume group if it has the same name as the reconciled LVMVolumeGroup name.

[openshift-ci-robot]

@suleymanakbas91: This pull request references OCPVE-605 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "4.15.0" version, but no target version was set.

In response to this:

This PR allows LVMS to pick up and use an existing volume group if it has the same name as the reconciled LVMVolumeGroup name.

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[suleymanakbas91]

/hold

[codecov-commenter]

Codecov Report

Merging #448 (f1f4092) into main (61e044a) will increase coverage by 0.11%.
Report is 2 commits behind head on main.
The diff coverage is 55.17%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #448      +/-   ##
==========================================
+ Coverage   56.77%   56.88%   +0.11%     
==========================================
  Files          22       22              
  Lines        1728     1735       +7     
==========================================
+ Hits          981      987       +6     
  Misses        626      626              
- Partials      121      122       +1     

Files	Coverage Δ
internal/controllers/vgmanager/devices.go	80.17% <100.00%> (ø)
internal/controllers/vgmanager/controller.go	35.63% <53.57%> (+1.02%)	⬆️

[jakobmoellerdev]

just 2 small comments, other than that LGTM. pretty complex flow change, so not sure if i got all the cases

[jakobmoellerdev]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jakobmoellerdev, suleymanakbas91

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[suleymanakbas91]

/unhold

[openshift-ci]

@suleymanakbas91: all tests passed!

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