Delete Unnecessary files in Extension Bucket (#4606)

Co-authored-by: Alexander Bayandin <alexander@neon.tech>

.github/workflows/build_and_test.yml

@@ -967,6 +967,10 @@ jobs:
           rm -rf ./extensions-to-upload/share/extension/neon*
           rm -rf ./extensions-to-upload/lib/neon*
 
+          # Delete leftovers from the extension build step
+          rm -rf ./extensions-to-upload/lib/pgxs
+          rm -rf ./extensions-to-upload/lib/pkgconfig
+
           docker cp ${{ steps.create-container.outputs.EID }}:/extensions ./custom-extensions
           for EXT_NAME in $(ls ./custom-extensions); do
             mkdir -p ./extensions-to-upload/${EXT_NAME}/share