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_15/v178.go

@@ -13,5 +13,5 @@ func AddLFSMirrorColumns(x *xorm.Engine) error {
 		LFSEndpoint string `xorm:"lfs_endpoint TEXT"`
 	}
 
-	return x.Sync2(new(Mirror))
+	return x.Sync(new(Mirror))
 }

models/migrations/v1_15/v181.go

@@ -26,7 +26,7 @@ func AddPrimaryEmail2EmailAddress(x *xorm.Engine) error {
 	}
 
 	// Add lower_email and is_primary columns
-	if err := x.Table("email_address").Sync2(new(EmailAddress1)); err != nil {
+	if err := x.Table("email_address").Sync(new(EmailAddress1)); err != nil {
 		return err
 	}
 
@@ -44,7 +44,7 @@ func AddPrimaryEmail2EmailAddress(x *xorm.Engine) error {
 	}
 
 	// change lower_email as unique
-	if err := x.Sync2(new(EmailAddress)); err != nil {
+	if err := x.Sync(new(EmailAddress)); err != nil {
 		return err
 	}
 

models/migrations/v1_15/v182.go

@@ -20,7 +20,7 @@ func AddIssueResourceIndexTable(x *xorm.Engine) error {
 		return err
 	}
 
-	if err := sess.Table("issue_index").Sync2(new(ResourceIndex)); err != nil {
+	if err := sess.Table("issue_index").Sync(new(ResourceIndex)); err != nil {
 		return err
 	}
 

models/migrations/v1_15/v183.go

@@ -30,8 +30,8 @@ func CreatePushMirrorTable(x *xorm.Engine) error {
 		return err
 	}
 
-	if err := sess.Sync2(new(PushMirror)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := sess.Sync(new(PushMirror)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 
 	return sess.Commit()

models/migrations/v1_15/v184.go

@@ -42,8 +42,8 @@ func RenameTaskErrorsToMessage(x *xorm.Engine) error {
 		return err
 	}
 
-	if err := sess.Sync2(new(Task)); err != nil {
-		return fmt.Errorf("error on Sync2: %w", err)
+	if err := sess.Sync(new(Task)); err != nil {
+		return fmt.Errorf("error on Sync: %w", err)
 	}
 
 	if messageExist {

models/migrations/v1_15/v185.go

@@ -17,5 +17,5 @@ func AddRepoArchiver(x *xorm.Engine) error {
 		CommitID    string `xorm:"VARCHAR(40) unique(s)"`
 		CreatedUnix int64  `xorm:"INDEX NOT NULL created"`
 	}
-	return x.Sync2(new(RepoArchiver))
+	return x.Sync(new(RepoArchiver))
 }

models/migrations/v1_15/v186.go

@@ -21,5 +21,5 @@ func CreateProtectedTagTable(x *xorm.Engine) error {
 		UpdatedUnix timeutil.TimeStamp `xorm:"updated"`
 	}
 
-	return x.Sync2(new(ProtectedTag))
+	return x.Sync(new(ProtectedTag))
 }

models/migrations/v1_15/v187.go

@@ -15,7 +15,7 @@ func DropWebhookColumns(x *xorm.Engine) error {
 		Signature string `xorm:"TEXT"`
 		IsSSL     bool   `xorm:"is_ssl"`
 	}
-	if err := x.Sync2(new(Webhook)); err != nil {
+	if err := x.Sync(new(Webhook)); err != nil {
 		return err
 	}
 
@@ -27,7 +27,7 @@ func DropWebhookColumns(x *xorm.Engine) error {
 		ContentType int
 		IsSSL       bool
 	}
-	if err := x.Sync2(new(HookTask)); err != nil {
+	if err := x.Sync(new(HookTask)); err != nil {
 		return err
 	}