Until pip out-of-tree dependencies work with our setup and we can update
to newer versions of our dependencies, assume api client is installed
without explicitly adding it as a dependency. The install script
installs api_client anyway
Fixes: #1435
* Add shared python format-check target
* Add .format-check to api lint target
* Format api code with makefile format target
* Add .format-check to tools lint target
* Add .format-check to analyzer lint target
* Format analyzer code with makefile format target
* Add .format-check to celery lint target
* Add .format-check to api_client lint target
* Format api_client code with makefile format target
* Add .format-check to playout lint target
* Run CI linting in parallel
* Disable isort in pre-commit