[SSSD] [sssd PR#5774][comment] configure: do not unset PYTHON_PREFIX and PYTHON_EXEC_PREFIX

[pbrezina]

  URL: https://github.com/SSSD/sssd/pull/5774
Title: #5774: configure: do not unset PYTHON_PREFIX and PYTHON_EXEC_PREFIX

pbrezina commented:
"""
Mock build succeeded. The failure is ny in multihost tests which is expected.
"""

See the full comment at https://github.com/SSSD/sssd/pull/5774#issuecomment-914080714