feat: Add support for ash calculation `field?: false` option

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### Is your feature request related to a problem? Please describe.

Dependency for releasing https://github.com/ash-project/ash/issues/2242

### Describe the solution you'd like

When a calculation has field?: false
- Exclude from response schema
- Include as filter option when filterable?: true
- Include as sort option when sortable?: true

### Describe alternatives you've considered

_No response_

### Additional context

_No response_

Start by locating where Ash calculations are turned into GraphQL response fields, filters, and sorts. Verify behavior for field?: false with filterable?: true and sortable?: true: the calculation should be absent from the response schema while remaining available in the applicable filter and sort options.

Written by the indexing model from the issue text.