Secure the e2e yaml GHA

[manuelbuil]

Proposed Changes

Verify a kubectl sha265 to make sure that the downloaded kubectl binary was not tampered

Types of Changes

Security improvement

Verification

Testing

Linked Issues

#13886

User-Facing Change

Further Comments

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (f1deb4e) to head (91f4eec).
⚠️ Report is 9 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #13885       +/-   ##
===========================================
- Coverage   22.38%        0   -22.39%     
===========================================
  Files         193        0      -193     
  Lines       15631        0    -15631     
===========================================
- Hits         3499        0     -3499     
+ Misses      11650        0    -11650     
+ Partials      482        0      -482     

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