Improve TColumnConfig typing on columns that extend TableColumnTextBase

[mollykreis]

Pull Request

🤨 Rationale

Resolves #1964

👩‍💻 Implementation

TableColumnTextBase cannot simply be made generic because TypeScript doesn't support generics and mixins together: microsoft/TypeScript#26154.

Therefore, each concrete instance of TableColumnTextBase should add its own mixins in a way that they get mixed into TableColumnTextBase<TColumnConfig> rather than TableColumn. To avoid code duplicate, I created a function, mixinTextBase, that mixes in the appropriate mixins for TableColumnTextBase.

🧪 Testing

• Unit tests still pass
• Manually verified that the type of this.columnInternals.columnConfig is correct for a column using mixinTextBase
• Sanity tested examples in storybook to make sure columns still behave as expected

✅ Checklist

• I have updated the project documentation to reflect my changes or determined no changes are needed.

[mollykreis]

@atmgrifter00, will you buddy this PR for me?

[rajsite]

fantastic!