run_reservoirsimulator should not print a traceback when Eclipse fails

[berland]

run_reservoirsimulator.py errors with a traceback when Eclipse fails. This should be handled better.

Example from logs:

step ECLIPSE100 failed with: 'Process exited with status code 1'
	stderr file: '/scratch/xxxxx/<username>/rmswellpathI4xxxxxxxDEC/realization-46/ECLIPSE100.stderr.27',
	its contents:
Traceback (most recent call last):
  File "/prog/res/komodo/2025.02.08-py311-rhel8/root/lib/python3.11/site-packages/ert/resources/forward_models/run_reservoirsimulator.py", line 441, in <module>
    run_reservoirsimulator(non_empty_args[1:])
  File "/prog/res/komodo/2025.02.08-py311-rhel8/root/lib/python3.11/site-packages/ert/resources/forward_models/run_reservoirsimulator.py", line 414, in run_reservoirsimulator
    ).run_eclipseX00()
      ^^^^^^^^^^^^^^^^
  File "/prog/res/komodo/2025.02.08-py311-rhel8/root/lib/python3.11/site-packages/ert/resources/forward_models/run_reservoirsimulator.py", line 247, in run_eclipseX00
    raise subprocess.CalledProcessError(return_code, self.eclrun_command)
subprocess.CalledProcessError: Command '['/prog/res/ecl/grid/macros/eclrun', 'eclipse', '--version', '2024.3', '/scratch/scratcxxxxxxx/<username>/rmswelxxxxxxxxxxxxxxx/realization-46/eclipse/model/MASTER-46.DATA', '--summary-conversion', 'no']' returned non-zero exit status 255.