Rename Sync2 -> Sync (#26479)

The xorm `Sync2` has already been deprecated in favor of `Sync`,
so let's do the same inside the Gitea codebase.

Command used to replace everything:
```sh
for i in $(ag Sync2 --files-with-matches); do vim $i -c ':%sno/Sync2/Sync/g' -c ':wq'; done
```

models/migrations/v1_14/v155.go

@@ -14,8 +14,8 @@ func AddChangedProtectedFilesPullRequestColumn(x *xorm.Engine) error {
 		ChangedProtectedFiles []string `xorm:"TEXT JSON"`
 	}
 
-	if err := x.Sync2(new(PullRequest)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := x.Sync(new(PullRequest)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 	return nil
 }

models/migrations/v1_14/v158.go

@@ -27,7 +27,7 @@ func UpdateCodeCommentReplies(x *xorm.Engine) error {
 		ReviewID int64 `xorm:"index"`
 	}
 
-	if err := x.Sync2(new(Comment)); err != nil {
+	if err := x.Sync(new(Comment)); err != nil {
 		return err
 	}
 

models/migrations/v1_14/v160.go

@@ -12,5 +12,5 @@ func AddBlockOnOfficialReviewRequests(x *xorm.Engine) error {
 		BlockOnOfficialReviewRequests bool `xorm:"NOT NULL DEFAULT false"`
 	}
 
-	return x.Sync2(new(ProtectedBranch))
+	return x.Sync(new(ProtectedBranch))
 }

models/migrations/v1_14/v161.go

@@ -41,7 +41,7 @@ func ConvertTaskTypeToString(x *xorm.Engine) error {
 	type HookTask struct {
 		Typ string `xorm:"VARCHAR(16) index"`
 	}
-	if err := x.Sync2(new(HookTask)); err != nil {
+	if err := x.Sync(new(HookTask)); err != nil {
 		return err
 	}
 

models/migrations/v1_14/v162.go

@@ -39,7 +39,7 @@ func ConvertWebhookTaskTypeToString(x *xorm.Engine) error {
 	type Webhook struct {
 		Type string `xorm:"char(16) index"`
 	}
-	if err := x.Sync2(new(Webhook)); err != nil {
+	if err := x.Sync(new(Webhook)); err != nil {
 		return err
 	}
 

models/migrations/v1_14/v163.go

@@ -18,7 +18,7 @@ func ConvertTopicNameFrom25To50(x *xorm.Engine) error {
 		UpdatedUnix int64 `xorm:"INDEX updated"`
 	}
 
-	if err := x.Sync2(new(Topic)); err != nil {
+	if err := x.Sync(new(Topic)); err != nil {
 		return err
 	}
 

models/migrations/v1_14/v164.go

@@ -30,8 +30,8 @@ func (grant *OAuth2Grant) TableName() string {
 }
 
 func AddScopeAndNonceColumnsToOAuth2Grant(x *xorm.Engine) error {
-	if err := x.Sync2(new(OAuth2Grant)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := x.Sync(new(OAuth2Grant)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 	return nil
 }

models/migrations/v1_14/v167.go

@@ -16,8 +16,8 @@ func AddUserRedirect(x *xorm.Engine) (err error) {
 		RedirectUserID int64
 	}
 
-	if err := x.Sync2(new(UserRedirect)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := x.Sync(new(UserRedirect)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 	return nil
 }

models/migrations/v1_14/v170.go

@@ -14,8 +14,8 @@ func AddDismissedReviewColumn(x *xorm.Engine) error {
 		Dismissed bool `xorm:"NOT NULL DEFAULT false"`
 	}
 
-	if err := x.Sync2(new(Review)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := x.Sync(new(Review)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 	return nil
 }

models/migrations/v1_14/v171.go

@@ -14,8 +14,8 @@ func AddSortingColToProjectBoard(x *xorm.Engine) error {
 		Sorting int8 `xorm:"NOT NULL DEFAULT 0"`
 	}
 
-	if err := x.Sync2(new(ProjectBoard)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := x.Sync(new(ProjectBoard)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 	return nil
 }

models/migrations/v1_14/v172.go

@@ -15,5 +15,5 @@ func AddSessionTable(x *xorm.Engine) error {
 		Data   []byte `xorm:"BLOB"`
 		Expiry timeutil.TimeStamp
 	}
-	return x.Sync2(new(Session))
+	return x.Sync(new(Session))
 }

models/migrations/v1_14/v173.go

@@ -14,8 +14,8 @@ func AddTimeIDCommentColumn(x *xorm.Engine) error {
 		TimeID int64
 	}
 
-	if err := x.Sync2(new(Comment)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := x.Sync(new(Comment)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 	return nil
 }

models/migrations/v1_14/v174.go

@@ -26,8 +26,8 @@ func AddRepoTransfer(x *xorm.Engine) error {
 		return err
 	}
 
-	if err := sess.Sync2(new(RepoTransfer)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := sess.Sync(new(RepoTransfer)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 
 	return sess.Commit()

models/migrations/v1_14/v176.go

@@ -42,7 +42,7 @@ func RemoveInvalidLabels(x *xorm.Engine) error {
 		LabelID int64 `xorm:"UNIQUE(s)"`
 	}
 
-	if err := x.Sync2(new(Comment), new(Issue), new(Repository), new(Label), new(IssueLabel)); err != nil {
+	if err := x.Sync(new(Comment), new(Issue), new(Repository), new(Label), new(IssueLabel)); err != nil {
 		return err
 	}
 

models/migrations/v1_14/v177.go

@@ -23,8 +23,8 @@ func DeleteOrphanedIssueLabels(x *xorm.Engine) error {
 		return err
 	}
 
-	if err := sess.Sync2(new(IssueLabel)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := sess.Sync(new(IssueLabel)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 
 	if _, err := sess.Exec(`DELETE FROM issue_label WHERE issue_label.id IN (