Allow setting cwd of post-write hooks

[maresb]

Is your feature request related to a problem? Please describe.

I am running pre-commit as a post-write hook. However, when using command.revision(), the working directory may be outside of my repository, in which case my .pre-commit-config.yaml is not found.

Describe the solution you'd like

In my alembic.ini I want to add the following line under the [post_write_hooks] section

pre-commit.cwd = %(here)s

in order to have a reproducible cwd.

PR incoming...

[sqla-tester]

Ben Mares has proposed a fix for this issue in the master branch:

Add cwd post-write hook option https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/2685