fix(http): times out on large repositories

[aymanbagabas]

This was due to having a set value of Read/Write http server timeout
values, and a faulty git gzip request handler. The server drops the
connection if there isn't any read/write within 10 seconds.

Replace the read/write timeouts with idle timeout which will reset the
counter to either read/write within 10 seconds. Idle timeout is only
used when keep-alive is enabled. That is the case by default.

Fix git by properly handling gzip and buffered git service responses.

Improve git http handler logging

Fixes: #427

[codecov]

Codecov Report

Attention: 3821 lines in your changes are missing coverage. Please review.

Comparison is base (050a0d1) 50.52% compared to head (ca1c164) 47.77%.
Report is 87 commits behind head on main.

Files	Patch %	Lines
pkg/web/git_lfs.go	25.15%	574 Missing and 27 partials ⚠️
pkg/git/lfs.go	1.98%	297 Missing ⚠️
pkg/ui/pages/repo/stash.go	0.00%	185 Missing ⚠️
pkg/backend/webhooks.go	17.82%	162 Missing and 4 partials ⚠️
pkg/ssh/cmd/webhooks.go	45.90%	156 Missing and 9 partials ⚠️
pkg/ui/pages/repo/files.go	5.00%	152 Missing ⚠️
pkg/lfs/http_client.go	5.92%	127 Missing ⚠️
pkg/ui/pages/repo/refsitem.go	5.38%	123 Missing ⚠️
pkg/backend/repo.go	40.59%	93 Missing and 27 partials ⚠️
pkg/store/database/lfs.go	22.05%	105 Missing and 1 partial ⚠️
... and 81 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #428      +/-   ##
==========================================
- Coverage   50.52%   47.77%   -2.76%     
==========================================
  Files         107      154      +47     
  Lines        8209    13064    +4855     
==========================================
+ Hits         4148     6241    +2093     
- Misses       3767     6335    +2568     
- Partials      294      488     +194     

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