Support cluster name and remove state configuration

[jonathanio]

Prepare for the setup of the clustering by adding configuration support for setting the cluster name. This will be used for logging, providing a differentiator, and for metrics. Additionally, re-rename the endpoint label to component in order to avoid conflicts with pre-defined Prometheus labels, which is causing endpoint to be renamed to exported_endpoint, just like with service.

Also, remove all references, and all configuration, including the StatefulSet support, for managing state and storage for the application as the app will be going in another direction.

Checklist

Before raising or requesting a review of the pull request, please check and confirm the following items have been performed, where possible:

• I have performed a self-review of my code and run any tests locally to check
• I have added tests that prove that any changes are effective and work correctly
• I have made corresponding changes, as needed, to the repository documentation
• Each commit in, and this pull request, have meaningful subjects and bodies for context
• I have added release/..., type/..., and changes/... labels, as needed, to this pull request

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 79 lines in your changes missing coverage. Please review.

Project coverage is 9.94%. Comparing base (f6b7f06) to head (228071a).
Report is 3 commits behind head on main.

Files	Patch %	Lines
internal/serve/metrics/healthz/main.go	0.00%	35 Missing ⚠️
internal/serve/metrics/main.go	0.00%	18 Missing ⚠️
internal/serve/web/main.go	0.00%	13 Missing ⚠️
internal/serve/middleware/prometheus.go	0.00%	8 Missing ⚠️
internal/cmd/serve.go	0.00%	4 Missing ⚠️
internal/logger/main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main     #19      +/-   ##
========================================
+ Coverage   9.70%   9.94%   +0.23%     
========================================
  Files         17      16       -1     
  Lines        515     503      -12     
========================================
  Hits          50      50              
+ Misses       465     453      -12     

Flag	Coverage Δ
unit-tests	9.94% <0.00%> (+0.23%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
internal/logger/main.go	0.00% <0.00%> (ø)
internal/cmd/serve.go	0.00% <0.00%> (ø)
internal/serve/middleware/prometheus.go	0.00% <0.00%> (ø)
internal/serve/web/main.go	0.00% <0.00%> (ø)
internal/serve/metrics/main.go	0.00% <0.00%> (ø)
internal/serve/metrics/healthz/main.go	0.00% <0.00%> (ø)