🐛 Revert "add PDB to make sure at least 1 pod is always available durin…

[tmshort]

…g upgrade (#2362)"

This is causing an issue with multi-node upgrades downstream.

This reverts commit 5ed8cf4.

Description

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[tmshort]

/hold

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.54%. Comparing base (4e349e6) to head (06aaa45).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2370      +/-   ##
==========================================
+ Coverage   70.61%   74.54%   +3.93%     
==========================================
  Files          95       95              
  Lines        7375     7375              
==========================================
+ Hits         5208     5498     +290     
+ Misses       1728     1439     -289     
+ Partials      439      438       -1     

Flag	Coverage Δ
e2e	44.58% <ø> (-0.06%)	⬇️
experimental-e2e	48.91% <ø> (?)
unit	58.45% <ø> (ø)

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[tmshort]

Closing, as it's not needed.