Respect Applicability in LSP

[MichaReiser]

This task is part of #4181 and it depends on #4183 and #4185

• Double check if we need to change the LSP fix command to use --fix-unsafe when applying a code fix.
• Change the fixAll action handler to only apply safe fixes by default
• Introduce a new option to also run unsafe fixes as part of fixAll

[zanieb]

Discussed more at #6962 (comment)

[dhruvmanila]

Additionally, would having unsafe-fixes = true in the config mean that the fixAll code action includes them?

[zanieb]

Yes, I think it should.

[charliermarsh]

I think applicability is now respected in the LSP but @zanieb correct me if I'm wrong.