use SSA to apply the template objects

[metlos]

This is a minimal change in the member operator to start using the SSA to persist the changes to the templates.

I didn't do this change in toolchain-common to limit the "impact" this change would have at runtime across the ecosystem (i.e. not impact host-operator or ksctl).

The future steps for this would be to drastically simplify the template apply logic in toolchain-common.

As such, this is still more of an experiment than a definitive solution. At best, it is the first step in the larger effort to simplify the deployment of NSTemplateSets.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: metlos

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[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[metlos]

/test e2e

[codecov]

Codecov Report

Attention: Patch coverage is 81.57895% with 7 lines in your changes missing coverage. Please review.

Project coverage is 81.73%. Comparing base (fc36345) to head (dc4e7ed).

Files with missing lines	Patch %	Lines
controllers/nstemplateset/client.go	81.57%	5 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #634      +/-   ##
==========================================
+ Coverage   81.71%   81.73%   +0.02%     
==========================================
  Files          29       29              
  Lines        3330     3334       +4     
==========================================
+ Hits         2721     2725       +4     
  Misses        459      459              
  Partials      150      150              

Files with missing lines	Coverage Δ
...trollers/nstemplateset/nstemplateset_controller.go	70.58% <ø> (ø)
controllers/nstemplateset/client.go	83.01% <81.57%> (+1.38%)	⬆️

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[MatousJobanek]

Thanks a lot for the PR 👍

I didn't do this change in toolchain-common to limit the "impact" this change would have at runtime across the ecosystem (i.e. not impact host-operator or ksctl).

I would simply create a new function "next" to the existing one (in a separate file/package) and gradually propagate the change to all places in our code.
In this way, it would be better to isolate & review the actual "apply" code in toolchain-common repo, and also isolate the changes in separate PRs while propagating the new logic to the respective places in our operators.

In other words, can you please move the "apply" logic to toolchain-common?