[FEATURE] databricks_connection without including credentials in the Terraform setup

[sduveen-pivot]

Use-cases

We enjoy for all other objects we maintain in our Terraform setup for databricks not having any credentials/passwords maintained within it. E.g. We creeate secret scopes w/permissions, but not the secrets themselves.
Unfortunately, for the connections it requires the credentials while creating the resource.
It would be wonderful if we could e.g. reference a databricks secret for the connection options OR leave it unset and then if we modify it in the console, not for those additional options to be removed (I'd prefer the former secrets link)

Attempted Solutions

Proposal

References

https://registry.terraform.io/providers/databricks/databricks/latest/docs/resources/connection