[native] Trigger presto-native-sidecar-plugin test workflow when changes occur

The prestocpp build and tests needs to be triggered to test any change to the files in the directory.

Author: pdabre12

.github/workflows/prestocpp-linux-build-and-unit-test.yml

@@ -5,6 +5,7 @@ on:
   pull_request:
     paths:
       - 'presto-native-execution/**'
+      - 'presto-native-sidecar-plugin/**'
       - '.github/workflows/prestocpp-linux-build-and-unit-test.yml'
   push:
     branches: