Integrate Hiero Solo into PR Checks workflow

Author: Ndacyayisenga-droid

.github/workflows/build.yml

@@ -300,4 +300,4 @@ jobs:
           OPERATOR_ID: ${{ steps.solo.outputs.accountId }}
           OPERATOR_KEY: ${{ steps.solo.outputs.privateKey }}
           HEDERA_NETWORK: solo
-        run: ./gradlew -POPERATOR_ID=$OPERATOR_ID -POPERATOR_KEY=$OPERATOR_KEY -PHEDERA_NETWORK=$HEDERA_NETWORK :tck:test
+        run: ./gradlew -POPERATOR_ID=$OPERATOR_ID -POPERATOR_KEY=$OPERATOR_KEY -PHEDERA_NETWORK=$HEDERA_NETWORK :tck:test