[FEAURE] add `skip_on_delete` property for `query` resources

[jeffreyaven]

This query fails if the workspace does not exist, which should be the behavior for build or test operations but not for teardown ops

  - name: workspace_ready
    description: wait until the new workspace answers the workspace API as the deploying principal
    type: query
    file: databricks_workspace/current_user.iql
    props: []
    exports:
      - workspace_principal

fails with:

[2026-09-09T18:12:41Z ERROR stackql_deploy] Fatal error (matched 'dial tcp:'):

Query execution failed: query returns error: Get "https://<unknown>.cloud.databricks.com/api/2.1/unity-catalog/storage-credentials/datapao_lakehouse_dev_storage_credential": dial tcp: lookup <unknown>.cloud.databricks.com: no such host

adding in an additional property would solve this:

  - name: workspace_ready
    description: wait until the new workspace answers the workspace API as the deploying principal
    type: query
    file: databricks_workspace/current_user.iql
    skip_on_delete: true
    props: []
    exports:
      - workspace_principal

this would export null for workspace_principal