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

modules/repository/temp.go

@@ -32,7 +32,6 @@ func CreateTemporaryPath(prefix string) (string, error) {
 	if err != nil {
 		log.Error("Unable to create temporary directory: %s-*.git (%v)", prefix, err)
 		return "", fmt.Errorf("Failed to create dir %s-*.git: %w", prefix, err)
-
 	}
 	return basePath, nil
 }