[FEATURE] Add `databricks_recipients` Data Sources

[zhenlineo]

Use-cases

Between 2 workspaces, it is only allowed to have one recipient, but multiple shares. When creating a share, users normally also attempt to create a recipient assuming there are non existing recipient. So quite often, we receive broken deployment that complaining an existing recipient is already created.

Attempted Solutions

To avoid this issue, a data source api can be used to allow users to query existing recipients and only create when certain recipient dose not exist.

Proposal

data "databricks_recipients" "this" {}

output "recipient_name" {
  value     = data.databricks_recipients.this.recipients
  ...
}

References

https://docs.databricks.com/api/workspace/recipients/list https://registry.terraform.io/providers/databricks/databricks/latest/docs/data-sources/shares