Rollup merge of #107027 - GuillaumeGomez:rm-extra-removal, r=tmiasko

Rollup merge of #107027 - GuillaumeGomez:rm-extra-removal, r=tmiasko

Remove extra removal from test path

I don't know how to describe it shortly so better show what it's doing instead. Currently, there is one extra "rust/" before the test folder when running tests:

```
failures:

---- [rustdoc] rust/tests/rustdoc/redirect.rs stdout ----
```

This is a bit annoying when copying the test path. This is due to the moving of the `tests` folder one level up, meaning we were trimming too much of the `root_path`.

Now it is again displaying the correct path:

```
failures:

---- [rustdoc] tests/rustdoc/redirect.rs stdout ----
```