👷 CI: Split Windows job into multiple steps

This way, we can see which step exactly failed, if they fail.

.github/workflows/rust.yml

@@ -190,20 +190,33 @@ jobs:
         with:
           toolchain: stable
       - uses: Swatinem/rust-cache@v2
-      - name: Build and Test
+      - name: Set up PATH for dbus-daemon
         run: |
           $env:PATH += ";C:\bin"
+      - name: Launch dbus-daemon
+        run: |
           Start-Process dbus-daemon.exe --config-file=CI/win32-session.conf
+      - name: cargo test
+        run: |
           cargo test
-          # tokio feature
+      - name: test with tokio and no default features
+        run: |
           cargo test --no-default-features --features tokio
 
+      - name: Unset DBUS_SESSION_BUS_ADDRESS env
+        run: |
           $env:DBUS_SESSION_BUS_ADDRESS = $null
+      - name: Launch gdbus executable
+        run: |
           # This is an undocumented implementation detail, but easier and faster than calling the gdbus C library
           Start-Process gdbus.exe _win32_run_session_bus
+      - name: Keep gdbus alive
+        run: |
           # The gdbus process above will exit when idle for more than three seconds, usually right in the middle
           # of the doc tests. This process will keep it alive.
           Start-Process gdbus.exe 'monitor -e -d org.freedesktop.DBus'
+      - name: Test with gdbus feature
+        run: |
           cargo test --features zbus/windows-gdbus
 
   cross_check: