Explicitly setup a kotlin version

Change the `prepare-test` action to conditionally setup kotlin.

.github/workflows/__javascript-source-root.yml

@@ -45,6 +45,7 @@ jobs:
       with:
         version: ${{ matrix.version }}
         use-all-platform-bundle: 'false'
+        setup-kotlin: true
     - name: Set environment variable for Swift enablement
       if: >-
         runner.os != 'Windows' && (