Update keyfunc for compatibility and bug fixes

[MicahParks]

The purpose of this PR is to update the github.com/MicahParks/keyfunc package. The primary reason I'm making this PR is to introduce the changes from these releases:

• Support non-RFC compliant base64url padding (Compatibility update.)
• Check HTTP status code (Confirms the HTTP status code is 200. Bug fix.)
• JSON Web Keys restricted by "use" parameter (Better RFC compliance. Could be viewed as a bug fix.)

If there is any interest in the other features added since v1.0.3, please see the release page:
https://github.com/MicahParks/keyfunc/releases

For a quick summary of the new keyfunc.Options, see the documentation for its fields:
https://pkg.go.dev/github.com/MicahParks/keyfunc#Options

[MicahParks]

The new options here, JWKUseNoWhitelist and ResponseExtractor are 100% backwards compatible fields. I will remove these fields in an upcoming commit to this PR.

JWKUseNoWhitelist is set to true which means that any use JWK parameter is valid. The project has since changed it's default to only allow those with a use of sig (or empty). See more discussion here.

ResponseExtractor is set to keyfunc.ResponseExtractorStatusAny which means that any HTTP response status code will not produce an error. The project has since changed it's default to only allow http.StatusOK to not produce an error. See more discussion here.

[codecov-commenter]

Codecov Report

Base: 76.90% // Head: 76.84% // Decreases project coverage by -0.06% ⚠️

Coverage data is based on head (85584a6) compared to base (ba3c00a).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #837      +/-   ##
==========================================
- Coverage   76.90%   76.84%   -0.07%     
==========================================
  Files         103      103              
  Lines       11581    11581              
==========================================
- Hits         8906     8899       -7     
- Misses       2168     2174       +6     
- Partials      507      508       +1     

Impacted Files	Coverage Δ
pkg/filters/validator/basicauth.go	78.80% <0.00%> (-1.85%)	⬇️
pkg/filters/proxy/pool.go	79.17% <0.00%> (-0.88%)	⬇️

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