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`.

services/repository/adopt.go

@@ -357,7 +357,6 @@ func ListUnadoptedRepositories(ctx context.Context, query string, opts *db.ListO
 				return err
 			}
 			repoNamesToCheck = repoNamesToCheck[:0]
-
 		}
 		return filepath.SkipDir
 	}); err != nil {

services/repository/contributors_graph.go

@@ -187,7 +187,6 @@ func getExtendedCommitStats(repo *git.Repository, revision string /*, limit int
 					Stats: &commitStats,
 				}
 				extendedCommitStats = append(extendedCommitStats, res)
-
 			}
 			_ = stdoutReader.Close()
 			return nil

services/repository/files/update.go

@@ -208,7 +208,6 @@ func ChangeRepoFiles(ctx context.Context, repo *repo_model.Repository, doer *use
 				return nil, fmt.Errorf("ConvertToSHA1: Invalid last commit ID: %w", err)
 			}
 			opts.LastCommitID = lastCommitID.String()
-
 		}
 
 		for _, file := range opts.Files {
@@ -360,7 +359,6 @@ func handleCheckErrors(file *ChangeRepoFile, commit *git.Commit, opts *ChangeRep
 					Path: file.Options.treePath,
 				}
 			}
-
 		}
 	}