Add pip-wheel-metadata in .gitignore

[oncleben31]

Description:

When developing in a container with VSC, the folder pip-wheel-metadata is created during the container building process.

**Related issue (if applicable): NA

**Pull request with documentation for home-assistant.io (if applicable): NA

Example entry for configuration.yaml (if applicable):

NA

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist

[balloob]

Thanks!