Enable more revive linter rules (#30608)

Noteable additions:

- `redefines-builtin-id` forbid variable names that shadow go builtins
- `empty-lines` remove unnecessary empty lines that `gofumpt` does not
remove for some reason
- `superfluous-else` eliminate more superfluous `else` branches

Rules are also sorted alphabetically and I cleaned up various parts of
`.golangci.yml`.

(cherry picked from commit 74f0c84fa4245a20ce6fb87dac1faf2aeeded2a2)

Conflicts:
	.golangci.yml
	apply the linter recommendations to Forgejo code as well

models/migrations/base/db.go

@@ -214,7 +214,6 @@ func RecreateTable(sess *xorm.Session, bean any) error {
 				return err
 			}
 			sequenceMap[sequence] = sequenceData
-
 		}
 
 		// CASCADE causes postgres to drop all the constraints on the old table
@@ -279,7 +278,6 @@ func RecreateTable(sess *xorm.Session, bean any) error {
 					return err
 				}
 			}
-
 		}
 
 	default:

models/migrations/v1_11/v111.go

@@ -263,7 +263,6 @@ func AddBranchProtectionCanPushAndEnableWhitelist(x *xorm.Engine) error {
 		for _, u := range units {
 			var found bool
 			for _, team := range teams {
-
 				var teamU []*TeamUnit
 				var unitEnabled bool
 				err = sess.Where("team_id = ?", team.ID).Find(&teamU)
@@ -332,7 +331,6 @@ func AddBranchProtectionCanPushAndEnableWhitelist(x *xorm.Engine) error {
 		}
 
 		if !protectedBranch.EnableApprovalsWhitelist {
-
 			perm, err := getUserRepoPermission(sess, baseRepo, reviewer)
 			if err != nil {
 				return false, err

models/migrations/v1_20/v250.go

@@ -104,7 +104,7 @@ func ChangeContainerMetadataMultiArch(x *xorm.Engine) error {
 
 		// Convert to new metadata format
 
-		new := &MetadataNew{
+		newMetadata := &MetadataNew{
 			Type:             old.Type,
 			IsTagged:         old.IsTagged,
 			Platform:         old.Platform,
@@ -119,7 +119,7 @@ func ChangeContainerMetadataMultiArch(x *xorm.Engine) error {
 			Manifests:        manifests,
 		}
 
-		metadataJSON, err := json.Marshal(new)
+		metadataJSON, err := json.Marshal(newMetadata)
 		if err != nil {
 			return err
 		}

models/migrations/v1_6/v71.go

@@ -61,7 +61,6 @@ func AddScratchHash(x *xorm.Engine) error {
 			if _, err := sess.ID(tfa.ID).Cols("scratch_salt, scratch_hash").Update(tfa); err != nil {
 				return fmt.Errorf("couldn't add in scratch_hash and scratch_salt: %w", err)
 			}
-
 		}
 	}
 

models/migrations/v1_9/v85.go

@@ -81,7 +81,6 @@ func HashAppToken(x *xorm.Engine) error {
 			if _, err := sess.ID(token.ID).Cols("token_hash, token_salt, token_last_eight, sha1").Update(token); err != nil {
 				return fmt.Errorf("couldn't add in sha1, token_hash, token_salt and token_last_eight: %w", err)
 			}
-
 		}
 	}