limit builds for Docs
🚀 Feature
limit build for PR with are strictly related to docs, so skip:

Conda & Dockers & Full testing [GH actions]
TPU testing [CircleCI]
GPU testing [Drone CI]

Motivation
lower the resources requirements
Additional context
Btw, if you need skip GPU testing use magic work in commit or PR name [CI SKIP]
https://docs.drone.io/pipeline/skipping/