test: move more inspector sequential tests to parallel

This moves sequential inspector tests that can be run in
parallel (using random ports) to parallel.

Before:

```
❯ tools/test.py "test/sequential/test-inspector-*"
[00:07|% 100|+  28|-   0]: Done

All tests passed.
❯ tools/test.py "test/parallel/test-inspector-*"
[00:01|% 100|+  26|-   0]: Done

All tests passed.
```

After:

```
❯ tools/test.py "test/sequential/test-inspector-*"
[00:00|% 100|+   1|-   0]: Done

All tests passed.
❯ tools/test.py "test/parallel/test-inspector-*"
[00:01|% 100|+  53|-   0]: Done

All tests passed.
```

PR-URL: #47412
Refs: #47146
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: Moshe Atlow <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Rich Trott <[email protected]>

Author: joyeecheung