**Description**


It would be great if the metrics we publish in Airflow change to include TAGs for "variable" parts of those (such as dag_id, task_id, pool name) rather than being part of the metrics.

See here: https://airflow.apache.org/docs/1.10.12/metrics.html, https://airflow.readthedocs.io/en/latest/logging-monitoring/metrics.html  - those variable parts should be tags.

We might consider to change those metrics by default in 2.0 and possibly introduce a backport in 1.10.13 to allow people to migrate.


**Use case / motivation**

Having the variable parts of the metrics makes it really difficult to aggregate the metrics. Seems that statsd python library does not support tags, but there are possible solutions by installing extensions:

https://stackoverflow.com/questions/49852654/sending-statsd-metrics-with-tags-from-python-client

**Related Issues**

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self,
        dag_id: str,
        tasks: Iterator[dict[str, Any]] | Iterator[TI],
        created_counts: dict[str, int],
        hook_is_noop: bool,
        *,
        session: Session,
    ) -> None:
        """
        Create the necessary task instances from the given tasks.
        :param dag_id: DAG ID associated with the dagrun
        :param tasks: the tasks to create the task instances from
        :param created_counts: a dictionary of number of tasks -> total ti created by the task creator
        :param hook_is_noop: whether the task_instance_mutation_hook is noop
        :param session: the session to use
        """