Install CxxWrap Julia package and fix CI run

Author: franzpoeschel

.github/workflows/linux.yml

@@ -252,6 +252,8 @@ jobs:
         export CEI_SUDO="sudo"
         # Install libcxxwrap-julia
         cmake-easyinstall git+https://github.com/JuliaInterop/libcxxwrap-julia.git@v0.9.7 -DJulia_EXECUTABLE=/usr/local/julia-1.7.3/bin/julia
+        # Install the Julia side of CxxWrap
+        /usr/local/julia-1.7.3/bin/julia --eval 'using Pkg; Pkg.add("CxxWrap")'
     - name: Build
       env: {CXXFLAGS: -Werror, PKG_CONFIG_PATH: /usr/lib/x86_64-linux-gnu/pkgconfig}
       run: |
@@ -264,8 +266,6 @@ jobs:
           -DopenPMD_USE_INVASIVE_TESTS=ON
         cmake --build build --parallel 2
         ctest --test-dir build --output-on-failure
-        /usr/local/julia-1.7.3/bin/julia --eval 'using Pkg; Pkg.add("CxxWrap")'
-        /usr/local/julia-1.7.3/bin/julia src/binding/julia/tests/minimal_example.jl
 
   musllinux_py10:
     runs-on: ubuntu-20.04