feat(policy): Default Platform Keys (#2254)

### Proposed Changes

1.) Add a new table to represent default kas keys
2.) Add SetDefaultKey / GetDefaultKeys rpcs 
3.) Allow for keys of the same algorithm to be created even if another
is active
4.) Fix an issue with rotate where service level code could not get key

### Checklist

- [x] I have added or updated unit tests
- [x] I have added or updated integration tests (if appropriate)
- [ ] I have added or updated documentation

### Testing Instructions

Author: c-r33d

Makefile

@@ -71,6 +71,8 @@ proto-generate:
 	buf generate buf.build/grpc-ecosystem/grpc-gateway -o tmp-gen --template buf.gen.grpc.docs.yaml
 	buf generate buf.build/grpc-ecosystem/grpc-gateway -o tmp-gen --template buf.gen.openapi.docs.yaml
 
+	go run ./sdk/internal/codegen
+
 connect-wrapper-generate:
 	go run ./sdk/internal/codegen