pkg/client: add Config method to ActionClient

[azych]

This PR exposes action.Configuration of a specific actionClient instance via new Config method.

General motivation behind it is for the users to have an 'escape hatch' access to the underlying dependency objects that action.Configuration holds, which include for example:

• release records store
• registry client
• Kubernetes API client

More specific motivation comes from a scenario where an access to the underlying release store instance is needed in order to gracefully handle pending helm releases which were previously interrupted.

For additional context on this, see:
operator-framework/operator-controller#1776
and more specifically this thread: operator-framework/operator-controller#1776 (comment)

For additional context on the helm interruption issue, see:
helm/helm#5595 and helm/helm#7476

prerequisite and part of OCPBUGS-49729

cc @joelanford

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 55.55556% with 4 lines in your changes missing coverage. Please review.

Project coverage is 78.39%. Comparing base (08ab7fb) to head (b7952bb).
Report is 75 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/reconciler/internal/fake/actionclient.go	42.85%	3 Missing and 1 partial ⚠️

❗ There is a different number of reports uploaded between BASE (08ab7fb) and HEAD (b7952bb). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (08ab7fb)	HEAD (b7952bb)
	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #424      +/-   ##
==========================================
- Coverage   85.06%   78.39%   -6.67%     
==========================================
  Files          19       31      +12     
  Lines        1346     2486    +1140     
==========================================
+ Hits         1145     1949     +804     
- Misses        125      447     +322     
- Partials       76       90      +14     

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[porridge]

No idea whether exposing the configuration is the best way (I guess it depends on what exactly you want to achieve), but other than the nitpick the code looks OK.