Python_background_mcc_1d: Add CMake Options

Add missing CMake options in `WarpX-tests.ini`.

This must have been merged in parallel to when we modernized our
regression tests end of last year. BLAST-WarpX#2556

Author: ax3l

Regression/WarpX-tests.ini

@@ -2965,6 +2965,8 @@ runtime_params =
 customRunCmd = python3 PICMI_inputs_1d.py --test
 dim = 1
 addToCompileString = USE_PYTHON_MAIN=TRUE
+cmakeSetupOpts = -DWarpX_DIMS=1 -DWarpX_LIB=ON
+target = pip_install
 restartTest = 0
 useMPI = 1
 numprocs = 2