Remove root_path from logs

[aminalaee]

Closes #1290 and removes scope["root_path"] from logs and only logs scope["path"].

I could not find any other occurrences.

[euri10]

thanks @aminalaee

[levrik]

This change broke our monitoring a bit. We use FastAPI and mount a ASGI-app to /graphql route.
Since access logs are not really useful for GraphQL we filter them out in our monitoring to avoid a lot of noise.
Since this change access logs are logging / instead of /graphql which breaks this and makes our logs very noisy again.