Add query tags: DatabricksSqlSensor, DatabricksPartitionSensor

[cruseakshay]

Extends the session-level query-tags instrumentation added in #66895 to the remaining Databricks operators and sensors that send queries to Databricks:

• DatabricksSqlSensor
• DatabricksPartitionSensor
• DatabricksSQLStatementsOperator
• DatabricksSQLStatementsSensor

Closes: #68582

What changed

Two mechanisms are used because these components talk to Databricks in two different ways:

• DatabricksSqlSensor and DatabricksPartitionSensor go through DatabricksSqlHook, so they reuse the existing QUERY_TAGS session-parameter plumbing from Add session-level query tags to Databricks SQL operators #66895. The merged tags are set on the hook before the query runs.
• DatabricksSQLStatementsOperator and DatabricksSQLStatementsSensor use the REST Statement Execution API (/api/2.0/sql/statements/), which does not accept session_configuration. The API exposes a native query_tags field ([{"key": ..., "value": ...}]), so tags are injected directly into the request body. For the sensor, tags are only applied when it submits a new statement; if a statement_id is passed in, nothing is submitted and no tags are attached.

Each component gains two parameters mirroring the existing SQL operators:

• query_tags: dict[str, str | None] | None — user-supplied tags, templated

• include_airflow_query_tags: bool = True — merge in Airflow context tags:

  • dag_id
  • task_id
  • run_id
  • try_number
  • map_index

User-supplied tags win on key collision.

The Airflow-context tag logic that previously lived in operators/databricks_sql.py is extracted to a shared utils/query_tags.py module:

• get_airflow_query_tags
• build_query_tags
• dict_to_query_tag_list

This lets all five operators and sensors share one implementation.

This is a pure relocation: DatabricksSqlOperator and DatabricksCopyIntoOperator behavior is unchanged.

Was generative AI tooling used to co-author this PR?

• Yes, Claude Code

Generated-by: Claude Code, following the [guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#gen-ai-assisted-contributions)