boundary_credential_store_vault worker_filter continuous drift

[seanamos]

When using a worker_filter on boundary_credential_store_vault, initial creation works fine, however subsequent plans always show drift, + worker_filter = .....

Doing a quick investigation, this seems to be how https://github.com/hashicorp/terraform-provider-boundary/blob/b181e37a362c067cd8f755ff2c070737d5002dee/internal/provider/resource_credential_store_vault.go#L146C11-L146C11 is reading the value of worker_filter from the response.

worker_filter is nested in the attributes property of the response from Boundary, similar to ca_cert and I believe it needs to be handled similarly.