Refactor Status Updater to be resource agnostic

[pleshakov]

Proposed changes

Problem:
Currently, the status updater is aware of what resource it is updating the status of. This makes it difficult to extend because for each new resource we add support for, we have to modify the status updater.

Solution:

Replace old status updater with two new ones

(1) Regular Updater, to update statuses of multiple resources via UpdateRequest type.

(2) LeaderAwareGroupUpdater to update statuses of groups of resources and save any pending UpdateRequests until the updater is enabled (when pod becomes leader). It uses Regular Updater.

Using groups allow replacing UpdateRequests of subset of resources, without the need to recompute UpdateRequests for all resources.

The new status package is
resource agnostic. This is accomplished by representing status update as a function (Setter).

Other updates:

• provisioner manager uses regular Updater.
• static manager uses LeaderAwareGroupUpdater (because it needs to support leader election)
• framework Status setter were simplified and moved to static/status package
• status related functions in static package were moved to static/status package.
• Previous Build* functions were replaced with PrepareRequests functions. Such functions don't create any intermediate status representation (like it was before), but create status UpdateRequests which directly set the resource statuses.
• static manager handler conditionally updates statuses GatewayClass
  based on manager configuration. Previously, the conditional logic was
  implemented in the Status Updater.

CLOSES -- #1071

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

NONE

[codecov]

Codecov Report

Attention: Patch coverage is 95.18717% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 85.66%. Comparing base (3d180b2) to head (196a991).

Files	Patch %	Lines
internal/mode/static/manager.go	0.00%	9 Missing ⚠️
internal/mode/static/handler.go	92.85%	2 Missing and 2 partials ⚠️
internal/mode/provisioner/manager.go	0.00%	3 Missing ⚠️
internal/framework/status/updater.go	87.50%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1814      +/-   ##
==========================================
- Coverage   86.18%   85.66%   -0.52%     
==========================================
  Files          87       82       -5     
  Lines        5522     5331     -191     
  Branches       52        0      -52     
==========================================
- Hits         4759     4567     -192     
+ Misses        717      715       -2     
- Partials       46       49       +3     

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[kate-osborn]

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