[xcode27] Re-check undocumented CoreImage barcode generator filters in a later beta

During the Xcode 27.0 Beta 1 baseline update, the iOS/tvOS 27 runtimes started exposing a few CoreImage barcode generator filters at runtime, but they are still undocumented and are not declared in `CIFilterBuiltins.h` on any platform.

Please re-check these in a later Xcode 27 beta to see if they become documented / appear in the binding status and should be bound:

- `CICodabarBarcodeGenerator`
- `CICode39BarcodeGenerator`
- `CIEAN13BarcodeGenerator`
- `CIInterleaved2of5BarcodeGenerator`
- `CISeimensStarGenerator`

Context: these are currently skipped in `tests/introspection/ApiCoreImageFiltersTest.cs` in PR #25729.

Re-check the five CoreImage filters in a later Xcode 27 beta, then compare their runtime availability and declarations with the binding status. Start with tests/introspection/ApiCoreImageFiltersTest.cs and the context from PR #25729; done means determining whether the filters are documented and should be bound.

Written by the indexing model from the issue text.