Allow access to Prometheus in OpenShift via SA token

[wwadge]

Fixes: #1064

We can already access prometheus using Basic Auth. This PR adds support to access prometheus using Authorization: Bearer token too.

Signed-off-by: Wallace Wadge wwadge@gmail.com

[aryan9600]

thanks for opening this PR!

[codecov-commenter]

Codecov Report

Base: 54.24% // Head: 54.27% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (f280f27) compared to base (58270dd).
Patch coverage: 60.00% of modified lines in pull request are covered.

❗ Current head f280f27 differs from pull request most recent head a50d7de. Consider uploading reports for the commit a50d7de to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1338      +/-   ##
==========================================
+ Coverage   54.24%   54.27%   +0.02%     
==========================================
  Files          84       84              
  Lines       10016    10022       +6     
==========================================
+ Hits         5433     5439       +6     
  Misses       3927     3927              
  Partials      656      656              

Impacted Files	Coverage Δ
pkg/metrics/providers/prometheus.go	64.28% <60.00%> (+2.32%)	⬆️

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[aryan9600]

@wwadge Could you please squash all commits into one?

[wwadge]

@wwadge Could you please squash all commits into one?

Done

[aryan9600]

just one small nitpick, and we should be good to go :)

[aryan9600]

LGTM!
thanks @wwadge 🙇