[terra-data-grid] FlowsheetDataGrid - Remove unsupported props from docs

[smason0]

Summary

What was changed:
FlowsheetDataGrid API docs were updated to remove isSelectable from both Column and Cell, and isMasked from Cell. All columns and cells in FlowsheetDataGrid now set this prop in the underlying component to always be true.

Why it was changed:
Flowsheet should not allow columns and cells to be unselectable or masked. These concepts are needed by the sibling component WorklistDataGrid, but should not be included as configurable options for flowsheet.

Testing

This change was tested using:

• WDIO
• Jest
• Visual testing (please attach a screenshot or recording)
• Other (please describe below)
• No tests are needed

Reviews

In addition to engineering reviews, this PR needs:

• UX review
• Accessibility review
• Functional review

Additional Details

This PR resolves:

UXPLATFORM-9882

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@cerner/terra

[cm9361]

I understand the change for isSelectable. I am curious if there is never a use case for masked cells in the flowsheet. I also don't see the harm in it being available. If this is a hard requirement, should we also have logic to set isMasked to false for every cell similar to the logic you added for isSelectable?

[smason0]

I understand the change for isSelectable. I am curious if there is never a use case for masked cells in the flowsheet. I also don't see the harm in it being available. If this is a hard requirement, should we also have logic to set isMasked to false for every cell similar to the logic you added for isSelectable?

It is a requirement of Flowsheet, and isMasked sets a cell to be unselectable. The reason I don't set isMasked to false for every cell is because it is falsy by default, unlike isSelectable which must be true to make a cell or column header selectable.