Move duplicate `write_recipe`/`write_yaml` function out of tasks and import from single source

The function `write_recipe` in `configure_standardise`/`update_recipe_file.py` duplicates the functionality of `write_yaml` in `configure_process`/`configure_process.py`.

To remove this duplication, this functionality should be moved to a suitable location so it can be imported into both tasks. @ehogan suggested Cylc offers a solution for this.

Start by comparing write_recipe in configure_standardise/update_recipe_file.py with write_yaml in configure_process/configure_process.py, then review the referenced Cylc solution. Identify a suitable shared location and verify that both tasks import the single implementation without retaining duplicate functionality.

Written by the indexing model from the issue text.