[Release Tooling] Explicitly FST link direct/transitive deps. in module.modulemap

[ncooke3]

This resolves undefined symbol errors when using Firestore via SPM and building a target for testing. See issue 11656.

All three are needed. Interestingly, abseil is not. Likewise, there were missing leveldb and nanonpb symbols. I'd like to understand why.

I can't pin the behavior difference to an Xcode 15 release note, but it may be related to this one.

Some other approaches that may work here (though I think generalizing the current approach may be best):

1. Add modular imports of these frameworks into Firestore's source. I was not successful at it so far, but I suspect another way to link the missing symbols in is to modularly import each of these frameworks into Firestore's source code. The headers should be removed from the gRPC++, Boring-SSL, and gRPC-Core xcframeworks, and the generated module maps for each of those would need to be reworked to support being modularly imported by clients.
2. Check in a custom module map for Firestore that the zip-builder can reference.

Fix #11656
#no-changelog

[infinityX6920]

its review