Add LOO and cross-drug test matrix generation

[AbhirupaGhosh]

Added functions to build leave-one-out and cross-drug test matrices from parquet files. Updated the main matrix generation function to include calls to these new functions.

Description

What kind of change(s) are included?

• Feature (adds or updates new capabilities)
• Bug fix (fixes an issue).
• Enhancement (adds functionality).
• Breaking change (these changes would cause existing functionality to not work as expected).

Checklist

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• I have read and followed the CONTRIBUTING.md guidelines.
• I have searched for existing content to ensure this is not a duplicate.
• I have performed a self-review of these additions (including spelling, grammar, and related).
• I have added comments to my code to help provide understanding.
• I have added a test which covers the code changes found within this PR.
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[jananiravi]

Due to GitHub action (gha) styler updates I missed the main changes in this pr but I think it looks good based on a quick look.

[amcim]

I tested the functionality of the new functions. These look good, they produce the correct number of cross-drug parquets, LOO drug parquets, and there is no genome leakage in terms of training/held out drugs

There were multiple issues with CI and R CMD CHECK that I fixed. The one of note was that a query was failing, and I believe when the merge from main originally happened there was a conflict. It should be genome_drug.genome_id. The failed CI that points out this error can be looked at in previous actions, but basically I just had to correct this query.

Basically now that main will be back to passing CI, this will make reviewing the other open PRs here much more straightforward. (Particularly PR #8 )

One note I would like to make is in terms of the parsing filenames. If the filenames will be changing to remove the bug name in the prefix (such as in JRaviLab/amRviz#36) then this will need to be changed.

If CI passes, then I approve the merge