Fix PodDisruptionBudget not obeying highAvailability flag

[luhi-DT]

Description

Ticket: https://dt-rnd.atlassian.net/browse/DAQ-2140

Fixes #4008

Currently the highAvailability flag does not control the creation of the PodDisruptionBudget

How can this be tested?

set highAvailability to false in values file -> make manifest -> check if the PDB is there

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.60%. Comparing base (b1fa5e4) to head (e5f18d6).
Report is 1 commits behind head on main.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4013   +/-   ##
=======================================
  Coverage   64.60%   64.60%           
=======================================
  Files         397      397           
  Lines       26387    26387           
=======================================
  Hits        17047    17047           
  Misses       8017     8017           
  Partials     1323     1323           

Flag	Coverage Δ
unittests	64.60% <ø> (ø)

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[waodim]

tested it - works 👍