feat: Add preservePath option to proxy extension configuration

[alex-kattathra-johnson]

Fixes #24311

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
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[pjiang-dev]

Hi, if not already done could you create an issue for what this PR fixes and link it to this PR?

[pjiang-dev]

code LGTM, Could you also add something in the documentation for this new field and include the use case and how to set it?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.21%. Comparing base (1db5f2e) to head (7d0b1de).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #24312      +/-   ##
==========================================
+ Coverage   60.19%   60.21%   +0.02%     
==========================================
  Files         348      348              
  Lines       59904    59911       +7     
==========================================
+ Hits        36060    36078      +18     
+ Misses      20954    20946       -8     
+ Partials     2890     2887       -3     

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[alex-kattathra-johnson]

@pjiang-dev: Added to the docs, got the new test working and updated the PR description to reference the github issue.

[agaudreault]

Pending for enhancement triage/approval