fix: Add support for GitHub Enterprise cloud upload URLs

[TheNitek]

Fixes: #3985 by not adding API suffixes to upload.* enterprise URLs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.52%. Comparing base (c5bf1bc) to head (154941b).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3993   +/-   ##
=======================================
  Coverage   93.52%   93.52%           
=======================================
  Files         207      207           
  Lines       17593    17594    +1     
=======================================
+ Hits        16454    16455    +1     
  Misses        938      938           
  Partials      201      201           

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[gmlewis]

Thank you, @TheNitek!
LGTM.
Awaiting second LGTM+Approval from any other contributor to this repo before merging.

cc: @stevehipwell - @alexandear - @zyfy29 - @Not-Dhananjay-Mishra

[gmlewis]

Thank you, @alexandear!
Merging.