fix: revert select schemagen changes

[zinic]

Description

This changeset reverts an overeager refactor that affected schemagen and resulted in a type name change.

Motivation and Context

This change is not required and should be reverted despite the effect being non-breaking.

How Has This Been Tested?

Local test suite and launching the application.

Types of changes

• Chore (a change that does not modify the application functionality)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Documentation updates are needed, and have been made accordingly.
• I have added and/or updated tests to cover my changes.
• All new and existing tests passed.
• My changes include a database migration.

[superlinkx]

Mostly looks good, just sanity checking something that came out of our mock regeneration