chore: Update E2E Tests to v1beta1

[TimPansino]

Description

• Update operator + initcontainer e2e tests to use v1beta1
• Update bash script for e2e tests to actually check if initcontainer is added.
  • This could previously count null as a line, giving false positives.

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature / enhancement (non-breaking change which adds functionality)
• Security fix
• Bug fix (non-breaking change which fixes an issue)

Checklist:

• Documentation has been updated
• This change requires changes in testing:
  • unit tests
  • E2E tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.00%. Comparing base (a03d484) to head (e1a893e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #200   +/-   ##
=======================================
  Coverage   60.00%   60.00%           
=======================================
  Files          36       36           
  Lines        2928     2928           
=======================================
  Hits         1757     1757           
  Misses       1024     1024           
  Partials      147      147           

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