Migrate InputGroup's component-prop selects to SelectField, then delete the prop

10 sites, migrated in small batches by area, then delete InputGroup's component prop with a lint rule so it stays gone. Whole shape validated end to end in the #8115 spike.

Start by locating the 10 InputGroup component-prop select sites and the existing SelectField implementation. Migrate them in small area-based batches, then remove the component prop and add the lint rule that keeps it gone. Validate the complete shape end to end using the #8115 spike as the reference.

Written by the indexing model from the issue text.