fix(worker): Support gzip for git clients that require it

[nellh]

This is a fallback mode for when the client has set "content-encoding: gzip". Without this, we pass the gzipped response to git-upload-pack/git-receive-pack and this will crash with a protocol error, closing the connection.

Ideally HTTP decompression is handled before the Falcon request handler but introducing an HTTP proxy here is a larger change.

See #3087

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.63%. Comparing base (df9d423) to head (b60a724).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3103   +/-   ##
=======================================
  Coverage   42.62%   42.63%           
=======================================
  Files         592      592           
  Lines       37857    37860    +3     
  Branches     1098     1098           
=======================================
+ Hits        16137    16140    +3     
  Misses      21513    21513           
  Partials      207      207           

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