### Description


We need to access the time at which a given DAG was parsed last.

Airflow Version : 2.2.2 and above.

### Use case/motivation

End users want to run a given DAG post applying the changes they have done on them. This would mean that the DAG should be parsed post the edits done to it. Right now the last parsed time is available by accessing the airflow database only. Querying the database directly is not the best solution to the problem. Ideally airflow should be exposing APIs that end users can consume that can help provide the last parsed time for a given DAG.

### Related issues

Not Aware.

### Are you willing to submit a PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

help="When exporting as `.env` format, defines how connections should be serialized. Default is `uri`.",
    type=string_lower_type,
    choices=["json", "uri"],
)
ARG_CONN_IMPORT = Arg(("file",), help="Import connections from a file")
ARG_CONN_OVERWRITE = Arg(
    ("--overwrite",),
    help="Overwrite existing entries if a conflict occurs",
    required=False,
    action="store_true",
)
ARG_PROVIDER_NAME = Arg(
    ("provider_name",), help="Provider name, required to get provider information", type=str
)
ARG_FULL = Arg(
    ("-f", "--full"),
    help="Full information about the provider, including documentation information.",
    required=False,
    action="store_true",
)
ARG_USERNAME = Arg(("-u", "--username"), help="Username of the user", required=True, type=str)
ARG_USERNAME_OPTIONAL = Arg(("-u", "--username"), help="Username of the user", type=str)
ARG_FIRSTNAME = Arg(("-f", "--firstname"), help="First name of the user", required=True, type=str)
ARG_LASTNAME = Arg(("-l", "--lastname"), help="Last name of the user", required=True, type=str)
ARG_ROLE = Arg(
    ("-r", "--role"),
    help="Role of the user. Existing roles include Admin, User, Op, Viewer, and Public",
    required=True,
    type=str,
)