use eups python module for obtaining lsst_distrib version

[jchiang87]

Running at NERSC, I'm getting

  File "/global/u1/j/jchiang8/dev/imSim/imsim/readout.py", line 517, in prepare_hdus
    phdu = get_primary_hdu(self.eimage, self.ccd.getSerial(),
                           camera_name=self.camera_name,
                           logger=self.logger,
                           added_keywords=self.added_keywords)
  File "/global/u1/j/jchiang8/dev/imSim/imsim/readout.py", line 310, in get_primary_hdu
    write_package_versions(phdu.header)
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "/global/u1/j/jchiang8/dev/imSim/imsim/readout.py", line 336, in write_package_versions
    header[f"VER{i:05d}"] = version
    ~~~~~~^^^^^^^^^^^^^^^
  File "/cvmfs/sw.lsst.eu/almalinux-x86_64/lsst_distrib/w_2026_09/conda/envs/lsst-scipipe-12.1.0-exact-ext/lib/python3.13/site-packages/astropy/io/fits/header.py", line 222, in __setitem__
    self._update((key, value, comment))
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
  File "/cvmfs/sw.lsst.eu/almalinux-x86_64/lsst_distrib/w_2026_09/conda/envs/lsst-scipipe-12.1.0-exact-ext/lib/python3.13/site-packages/astropy/io/fits/header.py", line 1671, in _update
    self.append(card)
    ~~~~~~~~~~~^^^^^^
  File "/cvmfs/sw.lsst.eu/almalinux-x86_64/lsst_distrib/w_2026_09/conda/envs/lsst-scipipe-12.1.0-exact-ext/lib/python3.13/site-packages/astropy/io/fits/header.py", line 1128, in append
    card = Card(*card)
  File "/cvmfs/sw.lsst.eu/almalinux-x86_64/lsst_distrib/w_2026_09/conda/envs/lsst-scipipe-12.1.0-exact-ext/lib/python3.13/site-packages/astropy/io/fits/card.py", line 201, in __init__
    self.value = value
    ^^^^^^^^^^
  File "/cvmfs/sw.lsst.eu/almalinux-x86_64/lsst_distrib/w_2026_09/conda/envs/lsst-scipipe-12.1.0-exact-ext/lib/python3.13/site-packages/astropy/io/fits/card.py", line 355, in value
    raise ValueError(
    ...<3 lines>...
    )
ValueError: FITS header values must contain standard printable ASCII characters; 'g00e868bf88+d77a743519\n    ERROR: auth.munge: Failed to encode MUNGE. Socket communication error' contains characters not representable in ASCII or non-printable characters.

This fix addresses this error.