Sync branches into databases (#22743)

Related #14180
Related #25233 
Related #22639
Close #19786
Related #12763 

This PR will change all the branches retrieve method from reading git
data to read database to reduce git read operations.

- [x] Sync git branches information into database when push git data
- [x] Create a new table `Branch`, merge some columns of `DeletedBranch`
into `Branch` table and drop the table `DeletedBranch`.
- [x] Read `Branch` table when visit `code` -> `branch` page
- [x] Read `Branch` table when list branch names in `code` page dropdown
- [x] Read `Branch` table when list git ref compare page
- [x] Provide a button in admin page to manually sync all branches.
- [x] Sync branches if repository is not empty but database branches are
empty when visiting pages with branches list
- [x] Use `commit_time desc` as the default FindBranch order by to keep
consistent as before and deleted branches will be always at the end.

---------

Co-authored-by: Jason Song <i@wolfogre.com>

routers/web/repo/patch.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"code.gitea.io/gitea/models"
+	git_model "code.gitea.io/gitea/models/git"
 	"code.gitea.io/gitea/models/unit"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
@@ -94,9 +95,9 @@ func NewDiffPatchPost(ctx *context.Context) {
 		Content:      strings.ReplaceAll(form.Content, "\r", ""),
 	})
 	if err != nil {
-		if models.IsErrBranchAlreadyExists(err) {
+		if git_model.IsErrBranchAlreadyExists(err) {
 			// User has specified a branch that already exists
-			branchErr := err.(models.ErrBranchAlreadyExists)
+			branchErr := err.(git_model.ErrBranchAlreadyExists)
 			ctx.Data["Err_NewBranchName"] = true
 			ctx.RenderWithErr(ctx.Tr("repo.editor.branch_already_exists", branchErr.BranchName), tplEditFile, &form)
 			return