feat: add field to keep pvc after cr be deleted

[drivebyer]

Description

Add field to keep pvc after cr be deleted.

Type of change

• New feature (non-breaking change which adds functionality)

Checklist

• Tests have been added/modified and all tests pass.
• Functionality/bugs have been confirmed to be unchanged or fixed.
• I have performed a self-review of my own code.
• Documentation has been updated or added where necessary.

Additional Context

[codecov]

Codecov Report

Attention: 12 lines in your changes are missing coverage. Please review.

Comparison is base (bb69d00) 32.79% compared to head (76dae02) 32.76%.

Files	Patch %	Lines
k8sutils/finalizer.go	0.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #772      +/-   ##
==========================================
- Coverage   32.79%   32.76%   -0.04%     
==========================================
  Files          19       19              
  Lines        3232     3235       +3     
==========================================
  Hits         1060     1060              
- Misses       2113     2116       +3     
  Partials       59       59              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.