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_16/v189.go

@@ -58,7 +58,7 @@ func UnwrapLDAPSourceCfg(x *xorm.Engine) error {
 	}
 
 	// change lower_email as unique
-	if err := x.Sync2(new(LoginSource)); err != nil {
+	if err := x.Sync(new(LoginSource)); err != nil {
 		return err
 	}
 

models/migrations/v1_16/v190.go

@@ -16,7 +16,7 @@ func AddAgitFlowPullRequest(x *xorm.Engine) error {
 		Flow PullRequestFlow `xorm:"NOT NULL DEFAULT 0"`
 	}
 
-	if err := x.Sync2(new(PullRequest)); err != nil {
+	if err := x.Sync(new(PullRequest)); err != nil {
 		return fmt.Errorf("sync2: %w", err)
 	}
 	return nil

models/migrations/v1_16/v193.go

@@ -16,7 +16,7 @@ func AddRepoIDForAttachment(x *xorm.Engine) error {
 		ReleaseID  int64  `xorm:"INDEX"` // maybe zero when creating
 		UploaderID int64  `xorm:"INDEX DEFAULT 0"`
 	}
-	if err := x.Sync2(new(Attachment)); err != nil {
+	if err := x.Sync(new(Attachment)); err != nil {
 		return err
 	}
 

models/migrations/v1_16/v194.go

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

models/migrations/v1_16/v195.go

@@ -18,8 +18,8 @@ func AddTableCommitStatusIndex(x *xorm.Engine) error {
 		MaxIndex int64  `xorm:"index"`
 	}
 
-	if err := x.Sync2(new(CommitStatusIndex)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := x.Sync(new(CommitStatusIndex)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 
 	sess := x.NewSession()

models/migrations/v1_16/v196.go

@@ -14,8 +14,8 @@ func AddColorColToProjectBoard(x *xorm.Engine) error {
 		Color string `xorm:"VARCHAR(7)"`
 	}
 
-	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_16/v197.go

@@ -15,5 +15,5 @@ func AddRenamedBranchTable(x *xorm.Engine) error {
 		To          string
 		CreatedUnix int64 `xorm:"created"`
 	}
-	return x.Sync2(new(RenamedBranch))
+	return x.Sync(new(RenamedBranch))
 }

models/migrations/v1_16/v198.go

@@ -25,8 +25,8 @@ func AddTableIssueContentHistory(x *xorm.Engine) error {
 
 	sess := x.NewSession()
 	defer sess.Close()
-	if err := sess.Sync2(new(IssueContentHistory)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := sess.Sync(new(IssueContentHistory)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 	return sess.Commit()
 }

models/migrations/v1_16/v200.go

@@ -15,8 +15,8 @@ func AddTableAppState(x *xorm.Engine) error {
 		Revision int64
 		Content  string `xorm:"LONGTEXT"`
 	}
-	if err := x.Sync2(new(AppState)); err != nil {
-		return fmt.Errorf("Sync2: %w", err)
+	if err := x.Sync(new(AppState)); err != nil {
+		return fmt.Errorf("Sync: %w", err)
 	}
 	return nil
 }

models/migrations/v1_16/v202.go

@@ -16,7 +16,7 @@ func CreateUserSettingsTable(x *xorm.Engine) error {
 		SettingKey   string `xorm:"varchar(255) index unique(key_userid)"` // ensure key is always lowercase
 		SettingValue string `xorm:"text"`
 	}
-	if err := x.Sync2(new(UserSetting)); err != nil {
+	if err := x.Sync(new(UserSetting)); err != nil {
 		return fmt.Errorf("sync2: %w", err)
 	}
 	return nil

models/migrations/v1_16/v203.go

@@ -13,5 +13,5 @@ func AddProjectIssueSorting(x *xorm.Engine) error {
 		Sorting int64 `xorm:"NOT NULL DEFAULT 0"`
 	}
 
-	return x.Sync2(new(ProjectIssue))
+	return x.Sync(new(ProjectIssue))
 }

models/migrations/v1_16/v204.go

@@ -10,5 +10,5 @@ func AddSSHKeyIsVerified(x *xorm.Engine) error {
 		Verified bool `xorm:"NOT NULL DEFAULT false"`
 	}
 
-	return x.Sync2(new(PublicKey))
+	return x.Sync(new(PublicKey))
 }

models/migrations/v1_16/v206.go

@@ -18,7 +18,7 @@ func AddAuthorizeColForTeamUnit(x *xorm.Engine) error {
 		AccessMode int
 	}
 
-	if err := x.Sync2(new(TeamUnit)); err != nil {
+	if err := x.Sync(new(TeamUnit)); err != nil {
 		return fmt.Errorf("sync2: %w", err)
 	}
 

models/migrations/v1_16/v210.go

@@ -34,7 +34,7 @@ func RemigrateU2FCredentials(x *xorm.Engine) error {
 		CreatedUnix     timeutil.TimeStamp `xorm:"INDEX created"`
 		UpdatedUnix     timeutil.TimeStamp `xorm:"INDEX updated"`
 	}
-	if err := x.Sync2(&webauthnCredential{}); err != nil {
+	if err := x.Sync(&webauthnCredential{}); err != nil {
 		return err
 	}