feat: add privileged option to local_docker (#897)

[clumsy]

Adding privileged option for local_docker so that the container can start in privileged mode, same way we can do this for aws_batch scheduler. Defaults to False, same as in aws_batch.

Test plan: ☑ unit test added ☑ tested locally:

docker inspect --format='{{.HostConfig.Privileged}}' <CONTAINER_ID>
true

[clumsy]

For your consideration, @kiukchung

[clumsy]

Any chance you can check this request, @d4l3k?

[clumsy]

Any chance you can look at this one, @andywag?

[d4l3k]

Also not sure why it's not giving me an option to run the full tests -- maybe need to bump the PR.

@clumsy sorry for the delay in reviews on this

[clumsy]

No worries, @d4l3k. Should I force push an amended commit to trigger rebuild?

[clumsy]

Addressed your comment, @d4l3k. Please let me know if further modifications are needed.