Use modules/git for git commands

[typeless]

Updating them incrementally.

[codecov-io]

Codecov Report

Merging #6775 into master will decrease coverage by 0.02%.
The diff coverage is 7.31%.

@@            Coverage Diff             @@
##           master    #6775      +/-   ##
==========================================
- Coverage   41.42%   41.39%   -0.03%     
==========================================
  Files         440      440              
  Lines       59744    59703      -41     
==========================================
- Hits        24746    24715      -31     
+ Misses      31761    31751      -10     
  Partials     3237     3237

Impacted Files	Coverage Δ
models/pull.go	49.71% <7.31%> (-1.89%)	⬇️
models/repo_list.go	67.89% <0%> (+1.05%)	⬆️
modules/log/event.go	65.98% <0%> (+1.52%)	⬆️
modules/log/file.go	77.62% <0%> (+2.09%)	⬆️
models/unit.go	67.56% <0%> (+5.4%)	⬆️

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[lunny]

I found there are 38 revokes to process.GetManager().ExecDir.

[typeless]

@lunny I don't intend to do all replacements in one PR.

[zeripath]

Please take a look at #6672 I moved some commands in to modules/git there and also made hooks run on pushes.

[zeripath]

Sorry looks like I've caused conflicts

[typeless]

@zeripath never mind. PTAL when CI finished.