Add ici_with_unset_variables to focal CI BEFORE_RUN_TARGET_TEST_EMBED

Author: Levi Armstrong

.github/workflows/focal_build.yml

@@ -24,7 +24,7 @@ jobs:
       CCACHE_DIR: "/home/runner/work/tesseract_python/tesseract_python/Focal-Build/.ccache"
       PARALLEL_TESTS: false
       PARALLEL_BUILDS: false
-      BEFORE_RUN_TARGET_TEST_EMBED: "source /root/target_ws/install/setup.bash"
+      BEFORE_RUN_TARGET_TEST_EMBED: "ici_with_unset_variables source /root/target_ws/install/setup.bash"
       UPSTREAM_CMAKE_ARGS: "-DCMAKE_BUILD_TYPE=Release"
       TARGET_CMAKE_ARGS: "-DCMAKE_BUILD_TYPE=Debug -DTESSERACT_ENABLE_TESTING=ON"
     steps: