Streaming: Add */site-packages/* to the passthrough path filter

[kbolashev]

This should improve performance in use cases where the user has a venv inside of the project repository

Trying to look for modules inside of the project root takes a lot of time because of the fallback request to the server on a nonexistent file.

At the same time, I expect that a possibility of a user:

• having a site-packages folder in their repo/storing modules in a repository
• much more, having them in dvc and not in git To be close to nil