feat: configure scheduler on controller-manager and audit pods

[gergelysotidm]

What this PR does / why we need it:
Enables the configuration of a non-default k8s scheduler on both the audit and controller-manager pods.

Relevant for people who run an alternate scheduler next to the default one. Especially relevant on AWS/EKS, because there the users are not allowed to configure the scheduler.

The default value will use the default k8s scheduler (if you leave the setting out, k8s will assign the pods to the default-scheduler).

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 #

Special notes for your reviewer:

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 48.14%. Comparing base (3350319) to head (5a375e5).
Report is 150 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (3350319) and HEAD (5a375e5). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (3350319)	HEAD (5a375e5)
unittests	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3560      +/-   ##
==========================================
- Coverage   54.49%   48.14%   -6.35%     
==========================================
  Files         134      218      +84     
  Lines       12329    15134    +2805     
==========================================
+ Hits         6719     7287     +568     
- Misses       5116     7031    +1915     
- Partials      494      816     +322     

Flag	Coverage Δ
unittests	48.14% <ø> (-6.35%)	⬇️

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