move code.gitea.io/git to code.gitea.io/gitea/modules/git (#6364)

* move code.gitea.io/git to code.gitea.io/gitea/modules/git

* fix imports

* fix fmt

* fix misspell

* remove wrong tests data

* fix unit tests

* fix tests

* fix tests

* fix tests

* fix tests

* fix tests

* enable Debug to trace the failure tests

* fix tests

* fix tests

* fix tests

* fix tests

* fix tests

* comment commit count tests since git clone depth is 50

* fix tests

* update from code.gitea.io/git

* revert change to makefile

modules/git/tests/repos/repo1_bare/objects/28/39944139e0de9737a044f78b0e4b40d989a9e3

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modules/git/tests/repos/repo1_bare/objects/37/991dec2c8e592043f47155ce4808d4580f9123

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modules/git/tests/repos/repo1_bare/objects/5c/80b0245c1c6f8343fa418ec374b13b5d4ee658

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modules/git/tests/repos/repo1_bare/objects/6f/bd69e9823458e6c4a2fc5c0f6bc022b2f2acd1

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modules/git/tests/repos/repo1_bare/objects/9c/9aef8dd84e02bc7ec12641deb4c930a7c30185

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