HLA-1542: Remove deprecated functions in align.py and related deprecated tests

[s-goldman]

Resolves HLA-1542

This PR removes the deprecated function check_and_get_data from the align.py module. It also remove some deprecated tests that were used to verify the code. I have also removed a csv file and the conftest.py files as they are no longer used.

The check_and_get_data function was previously used for testing random datasets when vetting HAP products. It was used to download the relevant data if an ippsoot root (without any underscores) was given as an input to align.perform_align(); this functionality has been removed as it is no longer used, and can cause confusion as to whether a dataset has been overwritten.

The check_and_get_data function was still being used by one HAP regression test, test_apriori.py, but I have instead created a get_mast_data method in test_resources to retrieve the necessary data.

Checklist for maintainers

• added entry in CHANGELOG.rst within the relevant release section
• updated or added relevant tests
• updated relevant documentation
• added relevant label(s)

Regression test: Link