[COST-4230] make spec.authentication.token_url optional

[djnakabaale]

• Make spec.authentication.token_url optional to avoid error below during operator upgrade

error validating existing CRs against new CRD's schema for "kokumetricsconfigs.koku-metrics-cfg.openshift.io": error validating custom resource against new schema for KokuMetricsConfig koku-metrics-operator/kokumetricscfg-sample-v1beta1: [].spec.authentication.token_url: Required value

[codecov]

Codecov Report

Merging #238 (cff48bb) into main (3b413d3) will decrease coverage by 0.12%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #238      +/-   ##
==========================================
- Coverage   85.18%   85.07%   -0.12%     
==========================================
  Files          13       13              
  Lines        2720     2720              
==========================================
- Hits         2317     2314       -3     
- Misses        324      325       +1     
- Partials       79       81       +2     

Flag	Coverage Δ
unittests	85.07% <100.00%> (-0.12%)	⬇️

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

Files	Coverage Δ
controllers/kokumetricsconfig_controller.go	85.77% <100.00%> (-0.45%)	⬇️

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

100.0% Coverage
0.0% Duplication