Try some other things with the main test pipeline

First, see if I can get by without the libunwind-dev hack. I don't even
remember the exact issue, or where I found this solution.

Second, always use the latest stable version of Go instead of having to
change this all the time.

.github/workflows/main-tests.yml

@@ -12,11 +12,10 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v5
       with:
-        go-version: "1.23"
+        go-version: stable
     - name: Install libgstreamer1.0-dev
       run: |
         sudo apt-get update -y
-        sudo apt-get install -y libunwind-dev
         sudo apt-get install -y --no-install-recommends libgstreamer1.0-dev
     - name: Run Tests
       run: go test -v -count 2 -race ./...