test: move debugger tests with --port=0 to parallel

Before

```
❯ tools/test.py "sequential/test-debugger*"
[00:25|% 100|+  32|-   0]: Done

All tests passed.
❯ tools/test.py -J "parallel/test-debugger*"
[00:05|% 100|+   6|-   0]: Done

All tests passed.
```

After

```
❯ tools/test.py "sequential/test-debugger*"
[00:06|% 100|+   5|-   0]: Done

All tests passed.
❯ tools/test.py -J "parallel/test-debugger*"
[00:05|% 100|+  33|-   0]: Done

All tests passed.
```

PR-URL: nodejs#47274
Refs: nodejs#47146
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Moshe Atlow <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: joyeecheung