Added step to download and place assets from a release

.github/workflows/run_tests.yaml

@@ -62,5 +62,12 @@ jobs:
           printf "%s" "$(blender-downloader \
           ${{ matrix.blender-version }} --extract --remove-compressed \
           --quiet --print-blender-executable)" > blender_execs.txt
+      - name: Download assets
+        run: >
+          # TODO: use git describe --tags or equivalent to automatically get latest stable.
+          wget "https://github.com/TheDuckCow/MCprep/releases/download/3.4.3/MCprep_addon_v3.4.3.zip"
+          mkdir MCprep_stable_release
+          unzip ./MCprep_addon_v*.zip -d MCprep_stable_release
+          mv -f ./MCprep_stable_release/MCprep_addon/MCprep_resources/** ./MCprep_addon/MCprep_resources 
       - name: Run tests
         run: python run_tests.py -t test_prep_simple