mpi: hide configure log from CTest in CI
This actually happens when matplotlib
is being installed
simultaneously while mpi
is configuring. A DEPENDS_OPTIONAL
seems
just as hacky but can impact performance by introducing bottlenecks in
the build graph. Instead, just hide the problem and trust that
configure
can report actual errors reliably.
CDash report: https://open.cdash.org/viewBuildError.php?buildid=9376209
Overlapping tasks: https://gitlab.kitware.com/paraview/common-superbuild/-/jobs/9314240#L6291
Cc: @ryan.krattiger1