ci: remove microsoft-prod.list

This is added by default, and it is often broken, but we don't need
anything from it.

Closes #13473

.github/workflows/linux32.yml

@@ -61,6 +61,7 @@ jobs:
 
     steps:
       - run: |
+          sudo rm -f /etc/apt/sources.list.d/microsoft-prod.list
           sudo dpkg --add-architecture i386
           sudo apt-get update -y
           sudo apt-get install -y --no-install-suggests --no-install-recommends libtool autoconf automake pkg-config stunnel4 ${{ matrix.build.install_packages }}