lxelsim: Specify exact hdf5 variant requirements

[tmadlener]

Make sure that an hdf5 version that has all the necessary components built is installed.

Actual fix to the problem copilot tried to solve in #2

This now let's me get past build in lxelsim, but installation still fails, because lxelsim itself doesn't provide an install target:

==> Installing lxelsim-master-vfd3fw266jnameqjo44kfspu76cynq7s [123/123]
==> No patches needed for lxelsim
==> lxelsim: Executing phase: 'cmake'
==> lxelsim: Executing phase: 'build'
==> lxelsim: Executing phase: 'install'
==> Error: ProcessError: Command exited with status 2:
    '/opt/spack/opt/spack/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/linux-x86_64/gmake-4.4.1-72zrv7n6b25bzt5tkjwi6xfea6ldqalr/bin/make' '-j12' 'install'

1 error found in build log:
     142    make[2]: Leaving directory '/tmp/root/spack-stage/spack-stage-lxelsim-master-vfd3fw266jnameqjo44kfspu76cynq7s/spack-build-vfd3fw2'
     143    [100%] Built target lxelsim
     144    make[1]: Leaving directory '/tmp/root/spack-stage/spack-stage-lxelsim-master-vfd3fw266jnameqjo44kfspu76cynq7s/spack-build-vfd3fw2'
     145    /opt/spack/opt/spack/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/linux-x86_64/cmake-3.31.8-iw2qt2ktqd7e2kfrppqv54
            3hmouihcoi/bin/cmake -E cmake_progress_start /tmp/root/spack-stage/spack-stage-lxelsim-master-vfd3fw266jnameqjo44kfspu76cynq7s/spack-build-vfd3fw2/CMakeFiles 0
     146    ==> lxelsim: Executing phase: 'install'
     147    ==> [2025-10-09-11:54:24.257150] '/opt/spack/opt/spack/[padded-to-128-chars]/linux-x86_64/gmake-4.4.1-72zrv7n6b25bzt5tkjwi6xfea6ldqalr/bin/make' '-j12' 'install'
  >> 148    make: *** No rule to make target 'install'.  Stop.

See build log for details:
  /tmp/root/spack-stage/spack-stage-lxelsim-master-vfd3fw266jnameqjo44kfspu76cynq7s/spack-build-out.txt

[madbaron]

Fantastic, thank you!