feat: add v2alpha1 CRD

[binbin-li]

Description

What this PR does / why we need it:

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 #

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• 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?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

• Test A
• Test B

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: Patch coverage is 71.64179% with 57 lines in your changes missing coverage. Please review.

Project coverage is 74.31%. Comparing base (3f32f50) to head (43b9fcd).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/manager/manager.go	0.00%	28 Missing ⚠️
internal/controller/executor_controller.go	35.48%	16 Missing and 4 partials ⚠️
internal/executor/executor.go	92.17%	6 Missing and 3 partials ⚠️

❌ Your patch check has failed because the patch coverage (71.64%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #414      +/-   ##
==========================================
+ Coverage   74.03%   74.31%   +0.28%     
==========================================
  Files         121      120       -1     
  Lines        6789     6856      +67     
==========================================
+ Hits         5026     5095      +69     
+ Misses       1555     1550       -5     
- Partials      208      211       +3     

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