Multiple Required Features (Issue 4123 Req 5)

[ZacharyRener]

Description of the Change

There is already support for a singular required feature: $this->requires_feature = 'search';

This change adds support for multiple: $this->requires_features = ['search', 'autosuggest'];

While retaining support for a singular required feature.

How to test the Change

Add $this->requires_features = ['feature_slug_1', 'feature_slug_2']; to a Feature's constructor

Changelog Entry

Added - Ability for a feature to require multiple other features, instead of just one

Credits

Props @ZacharyRener

Checklist:

• [x] I agree to follow this project's Code of Conduct.
• [x] I have updated the documentation accordingly.
• [x] I have added Critical Flows, Test Cases, and/or End-to-End Tests to cover my change.
• [x] All new and existing tests pass.