Credentials task runner getter

[giorgiobasile]

Closes #16

Example

from prefect import flow

pc_credentials = PlanetaryComputerCredentials.load("BLOCK_NAME")
pc_runner = pc_credentials.get_dask_task_runner()

@flow(task_runner=pc_runner)
def my_flow():
    ...

Screenshots

Checklist

• References any related issue by including "Closes #" or "Closes ".
  • If no issue exists and your change is not a small fix, please create an issue first.
• Includes tests or only affects documentation.
• Passes pre-commit checks.
  • Run pre-commit install && pre-commit run --all locally for formatting and linting.
• Includes screenshots of documentation updates.
  • Run mkdocs serve view documentation locally.
• Summarizes PR's changes in CHANGELOG.md