Split lfs size from repository size (#22900)

releated to #21820

- Split `Size` in repository table as two new colunms, one is `GitSize`
for git size, the other is `LFSSize` for lfs data. still store full size
in `Size` colunm.
- Show full size on ui, but show each of them by a `title`;  example:

![image](https://user-images.githubusercontent.com/25342410/218636251-e200f085-d7e7-4a25-9ff1-b586a63e07a9.png)

- Return full size in api response.

---------

Signed-off-by: a1012112796 <1012112796@qq.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: DmitryFrolovTri <23313323+DmitryFrolovTri@users.noreply.github.com>
Co-authored-by: Giteabot <teabot@gitea.io>

models/migrations/migrations.go

@@ -507,6 +507,8 @@ var migrations = []Migration{
 	NewMigration("Add variable table", v1_21.CreateVariableTable),
 	// v262 -> v263
 	NewMigration("Add TriggerEvent to action_run table", v1_21.AddTriggerEventToActionRun),
+	// v263 -> v264
+	NewMigration("Add git_size and lfs_size columns to repository table", v1_21.AddGitSizeAndLFSSizeToRepositoryTable),
 }
 
 // GetCurrentDBVersion returns the current db version