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
d578b71d61