'no such file or directory' error if output path does not exist

### FAQ

- [X] Yes, my issue is not about [variability](https://github.com/GoogleChrome/lighthouse/blob/master/docs/variability.md) or [throttling](https://github.com/GoogleChrome/lighthouse/blob/master/docs/throttling.md).
- [X] Yes, my issue is not about a specific accessibility audit (file with [axe-core](https://github.com/dequelabs/axe-core) instead).

### URL

http://localhost:8080

### What happened?

Running the following command `lighthouse http://localhost:8080 --output=json,html --output-path=./reports/lighthouse --chrome-flags='--headless'` end up with an `ENOENT` error if the `reports` folder does not exist prior to running the script.

### What did you expect?

Since the reports folder is added to the .gitignore and does not exist in the repo, lighthouse should create the folder during the reports generation

### What have you tried?

Manually creating the `reports` folder before running the script solves the issue

### How were you running Lighthouse?

CLI

### Lighthouse Version

9.6.1

### Chrome Version

104.0.5094.0

### Node Version

16.15.0

### OS

Windows 11

### Relevant log output

_No response_