Rollup merge of #107819 - clubby789:x-py-root, r=jyn514

Set `rust-analyzer.check.invocationLocation` to `root`

Add
```json
    "rust-analyzer.check.invocationLocation": "root",
    "rust-analyzer.check.invocationStrategy": "once",
```
to the bundled VS code config. This prevents an error with r-a invoking `python3 x.py` in `src/bootstrap` where `x.py` does not exist.

r? ``@jyn514``