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: