[DOC] Document support of workspace bindings for storage credentials and external locations

[alexott]

Recent release added support for new workspace bidings

We need update this doc with examples: https://registry.terraform.io/providers/databricks/databricks/latest/docs/resources/catalog_workspace_binding

[matthewchoy-envisso]

Will this require a new version release for databricks terraform or is it possible just not documented?

I tried using the existing databricks_catalog_workspace_binding resource, with securable_name set to the storage_credential, and securable_type="storage_credential" (best guess).
It compiles and applies without error but doesnt change databricks.

I also tried setting isolation_mode = "ISOLATED" on the storage_credential similar to catalogs, but this doesnt compile.

[alexott]

It will require code changes, but not in this resource - we have #3624 for that, but API isn't published yet, so we need to wait.

[alexott]

Fixed by #3704