[fix][test] Replace calls to Auth0 with calls to wiremock

[michaeljmarshall]

Fixes #20473

Motivation

Our tests should be independent of external services like Auth0. We can use WireMock to create a server that responds to all OAuth2 requests. This PR removes calls to Auth0.com and replaces them with calls to a wiremock server.

Modifications

• Add a generic class to create an OIDC/OAuth2 wiremock server that can be used to get tokens.

Verifying this change

Tests are modified and still pass.

Documentation

• doc-not-needed

[codecov-commenter]

Codecov Report

Merging #20500 (349ab48) into master (3b862ae) will increase coverage by 36.19%.
The diff coverage is 50.00%.

@@              Coverage Diff              @@
##             master   #20500       +/-   ##
=============================================
+ Coverage     36.78%   72.98%   +36.19%     
- Complexity    12059    31941    +19882     
=============================================
  Files          1690     1867      +177     
  Lines        129001   138575     +9574     
  Branches      14041    15213     +1172     
=============================================
+ Hits          47453   101133    +53680     
+ Misses        75294    29424    -45870     
- Partials       6254     8018     +1764     

Flag	Coverage Δ
inttests	24.16% <0.00%> (+0.02%)	⬆️
systests	25.13% <0.00%> (+0.17%)	⬆️
unittests	72.26% <50.00%> (+40.31%)	⬆️

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

Impacted Files	Coverage Δ
...s/runtime/kubernetes/KubernetesRuntimeFactory.java	80.21% <50.00%> (+80.21%)	⬆️

... and 1433 files with indirect coverage changes

[lhotari]

LGTM, good work!

[lhotari]

It would be useful to make this implement AutoCloseable so that it can be directly used with Java's try with resources. This would require that the stop method is renamed to "close".

[michaeljmarshall]

Would we want to re-create the wiremock server for each test? Or are you thinking of using an annotation to close it when the object is no longer in scope?

[lhotari]

Would we want to re-create the wiremock server for each test? Or are you thinking of using an annotation to close it when the object is no longer in scope?

No. It was a generic comment about resource classes. Supporting AutoCloseable helps since you could use it with try-with-resources if there would be a need to have instances for a short scope. It's not necessary to make this change for this PR.