Add ability to use a module path entrypoint when using .serve or .deploy

[desertaxle]

Adds the ability to use an entrypoint in the form path.to.module.function_name when creating a deployment. This is useful for users who have flows contained in Python packages and can be used as an alternative code storage method. It also makes it easy to create deployments for flows from Prefect's integration packages.

Supports the implementation of #11998

Note: support for module path entrypoints for the prefect deploy CLI is not included in this PR. Support will be added in another PR and will likely require a refactor to the flow registration process used in prefect deploy.

Example

When deploying or serving a flow, users can specify that they'd like to use a module path entrypoint by providing a value to entrypoint_type:

from prefect_dbt.cloud.jobs import trigger_dbt_cloud_job_run_and_wait_for_completion

from prefect.deployments import EntrypointType

if __name__ == "__main__":
    trigger_dbt_cloud_job_run_and_wait_for_completion.deploy(
        name="demo-deploy-from-module",
        work_pool_name="olympic",
        entrypoint_type=EntrypointType.MODULE_PATH,
        job_variables={"env": { "EXTRA_PIP_PACKAGES": "prefect-dbt" } }
    )

This will update the entrypoint discovery logic to return the module path to the function instead of a filepath to the function.

Checklist

• This pull request references any related issue by including "closes <link to issue>"
  • If no issue exists and your change is not a small fix, please create an issue first.
• This pull request includes tests or only affects documentation.
• This pull request includes a label categorizing the change e.g. maintenance, fix, feature, enhancement, docs.

For documentation changes:

• This pull request includes redirect settings in netlify.toml for files that are removed or renamed.

For new functions or classes in the Python SDK:

• This pull request includes helpful docstrings.
• If a new Python file was added, this pull request contains a stub page in the Python SDK docs and an entry in mkdocs.yml navigation.

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[zzstoatzz]

nice!