Reduce executor code for docker

[mdegat01]

Proposed change

Currently nearly everything in the core DockerInterface class everything shares is done in the executor. This is problematic for a few reasons:

1. Not all of it needs to be. I/O interactions with docker should be done there but interactions with coresys objects don't need to be
2. We occasionally modify coresys objects (like when creating issues). These objects are shared across threads so this isn't safe
3. RFC: Job based API #1946 is quite difficult to implement. The goal is to allow one job to call another and track that interaction. But if entire jobs are occurring in the executor any place we did that tracking would have to be mutable across threads. If jobs are asyncio tasks that call into the executor as needed for I/O this becomes much more straightforward.

The docker interface is the biggest offender here, this PR changes that.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality to the supervisor)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:
• Link to cli pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast supervisor tests)
• Tests have been added to verify that the new code works.

If API endpoints of add-on configuration are added/changed:

• Documentation added/updated for developers.home-assistant.io

[agners]

Otherwise nice cleanup, LGTM!