Upload symbols to symbol server if inputs.package is enabled

At the moment, we're not sending the regular artifacts to the artifacts bucket, but we might want to change that.
We're also not putting the symbols on the symbol server for non-packaged builds, and might want to change that, too.

The reason I didn't is that we don't have users running around using the GitHub Actions builds as dev builds.

.github/workflows/windows.yml

@@ -192,6 +192,15 @@ jobs:
         name: openmw-windows-${{ inputs.image }}-sym-store-${{ github.sha }}
         path: ${{ github.workspace }}/SymStore/*
 
+    - name: Upload to symbol server
+      env:
+        AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+        AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+        AWS_DEFAULT_REGION: eu-west-3
+      if: ${{ env.AWS_ACCESS_KEY_ID != '' && env.AWS_SECRET_ACCESS_KEY != '' && inputs.package }}
+      working-directory: ${{ github.workspace }}/SymStore
+      run: aws --endpoint-url https://rgw.ctrl-c.liu.se s3 sync --size-only --exclude * --include *.ex_ --include *.dl_ --include *.pd_ . s3://openmw-sym
+
     - name: Add install directory to PATH
       shell: bash
       run: echo '${{ github.workspace }}/install' >> ${GITHUB_PATH}