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

routers/web/webfinger.go

@@ -102,23 +102,11 @@ func WebfingerQuery(ctx *context.Context) {
 			default:
 				ctx.Error(http.StatusNotFound)
 				return
-
-			}
-		case 4:
-			//nolint:gocritic
-			if parts[3] == "teams" {
-				ctx.Error(http.StatusNotFound)
-				return
-
-			} else {
-				ctx.Error(http.StatusNotFound)
-				return
 			}
 
 		default:
 			ctx.Error(http.StatusNotFound)
 			return
-
 		}
 
 	default: