ci: add cpptest to the clang-tidy job

Signed-off-by: Henry Schreiner <[email protected]>

Author: henryiii

.github/workflows/format.yml

@@ -55,3 +55,6 @@ jobs:
 
     - name: Build
       run: cmake --build build -j 2 -- --keep-going
+
+    - name: Embedded
+      run: cmake --build cpptest -j 2 -- --keep-going