Revert #1083 reflective access for PATCH method

[bitwiseman]

Description

#1083 removed reflective access. However, some endpoints do not support X-HTTP-Method-Override. In the interest of stability over purity, I'm reverting this.

Reopens #754
Fixes #1157

@gsmet @hcoles

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[codecov]

Codecov Report

Merging #1164 (2436ed0) into main (196ee25) will decrease coverage by 0.12%.
The diff coverage is 33.33%.

@@             Coverage Diff              @@
##               main    #1164      +/-   ##
============================================
- Coverage     73.55%   73.43%   -0.13%     
  Complexity     1831     1831              
============================================
  Files           185      185              
  Lines          6127     6143      +16     
  Branches        365      367       +2     
============================================
+ Hits           4507     4511       +4     
- Misses         1400     1411      +11     
- Partials        220      221       +1     

Impacted Files	Coverage Δ
.../kohsuke/github/GitHubHttpUrlConnectionClient.java	81.63% <33.33%> (-11.06%)	⬇️

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[bitwiseman]

Great. For Java 16, the reflection no longer works.

[gsmet]

Yeah, that's expected.

If you're using JDK 16+, either you add a --add-opens or you use OkHttp. Until we have a client based on the new JDK 11+ HTTP client.

[bitwiseman]

@gsmet @hcoles
The failures are due only to code coverage drop.