feat: validate plugin name on CR create

[susanshi]

Description

#1089
This PR adds substatus property to Verifier and Store CR. The controllers are also updated to validate plugin path.

What this PR does / why we need it:

• Adding sub status to Verifier and Store CRD
• Adding plugin path check on plugin creation
• Fix a bug where Policy CR isn't writing the success status

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):

Fixes # 1089

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• [ X] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Helm Chart Change (any edit/addition/update that is necessary for changes merged to the main branch)
• This change requires a documentation update

How Has This Been Tested?

Added unit test and e2e test for writing success and failure status in verifier and store

Checklist:

• Does the affected code have corresponding tests?
• Are the changes documented, not just with inline documentation, but also with conceptual documentation such as an overview of a new feature, or task-based documentation like a tutorial? Consider if this change should be announced on your project blog.
• Does this introduce breaking changes that would require an announcement or bumping the major version?
• Do all new files have appropriate license header?

Post Merge Requirements

• MAINTAINERS: manually trigger the "Publish Package" workflow after merging any PR that indicates Helm Chart Change

[codecov]

Codecov Report

Attention: 13 lines in your changes are missing coverage. Please review.

Comparison is base (2be797d) 61.72% compared to head (354c5cb) 61.72%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
pkg/common/plugin/download.go	40.00%	2 Missing and 1 partial ⚠️
pkg/controllers/store_controller.go	82.35%	3 Missing ⚠️
pkg/controllers/verifier_controller.go	82.35%	3 Missing ⚠️
pkg/verifier/factory/factory.go	0.00%	2 Missing and 1 partial ⚠️
pkg/controllers/policy_controller.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1265      +/-   ##
==========================================
- Coverage   61.72%   61.72%   -0.01%     
==========================================
  Files          97       97              
  Lines        6190     6236      +46     
==========================================
+ Hits         3821     3849      +28     
- Misses       2038     2054      +16     
- Partials      331      333       +2     

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[susanshi]

@junczhu , @akashsinghal , @binbin-li , this PR is ready for review when you get a chance, thanks!

[akashsinghal]

LGTM. Thanks