chore(ci): Let xtest focus on this sdk (#1959)

### Proposed Changes

*

### Checklist

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

### Testing Instructions

Author: dmihalcik-virtru

.github/workflows/checks.yaml

@@ -235,6 +235,7 @@ jobs:
   platform-xtest:
     uses: opentdf/tests/.github/workflows/xtest.yml@main
     with:
+      focus-sdk: go
       # use commit instead of ref so we can "go get" specific sdk version
       platform-ref: ${{ github.event.pull_request.head.sha || github.sha }}