Dataset filter for elements

[MarshallYan]

Pull Request Summary

Filter systems with or without certain elements(#329). Note that this is designed to be geneeral and should work for all datasets. Right now, it will be first applied to tmqm dataset for experiments to learn certain metals.

Key changes

We add a function in dataset module which filters each system in a given dataset through an element filter. This function returns a boolean indicating whether to include or exclude the system in the sub-dataset.

Associated Issue(s)

• Issue tmQM dataset splitting according to metal elements #329

Pull Request Checklist

• Issue(s) raised/addressed and linked
• Includes appropriate unit test(s)
• Appropriate docstring(s) added/updated
• Appropriate .rst doc file(s) added/updated
• PR is ready for review

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.12195% with 2 lines in your changes missing coverage. Please review.

Project coverage is 79.06%. Comparing base (54962ca) to head (3fc5271).
Report is 26 commits behind head on main.

Additional details and impacted files

[chrisiacovella]

There is a bug in the logic that needs to be revised (and tests expanded because they didn't catch the bug).