[FEATURE] add `purge_homedir_on_delete` for `databricks_user` resource

[nfx]

trafficstars

Use-cases

After creating temporary users on the workspace, we need to give them ability to experiment within their home folders. Once the experiment is done, we want to remove the user trace completely, including the /Users/[email protected] directory. Current user deletion does not remove user notebooks created by the user as part of standard Databricks REST API behavior