Bug/te eli 373 cohortlabel

[TOEL2]

Following the discovery of the ELI-373 bug it became apparent that we were previously filtering out parts of AND rules before we loop through each individual rule. This causes orphaned general rules which were previously part of AND rules to be evaluated on their own.

To solve this I have moved the filtering of rules to be inside the loop, so that we can understand the full context of the rule group (i.e does the group contain any non matching cohort labels).

It's a slight refactor that may deprecate the get_exclusion_rules function in favour of a new one I added, although I have kept that function in case we want to use it for another purpose for now until review.

Type of changes

• [X ] Refactoring (non-breaking change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would change existing functionality)
• [ X] Bug fix (non-breaking change which fixes an issue)

Checklist

• [ X] I am familiar with the contributing guidelines
• [ X] I have followed the code style of the project
• [ X] I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming

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