Revert "spec: remove nsswitch.conf scriptlet"
    
    This reverts commit 2afe364ac43a163fc4183870727e293fb9cea9d4.
    
    Unfortunately the build failed on dependencies:
    DEBUG util.py:444:  Error:
    DEBUG util.py:444:   Problem: package authselect-libs-1.3.0-1.fc36.x86_64 conflicts with glibc < 2.34.9000-27 provided by glibc-2.34.9000-26.fc36.x86_64
    DEBUG util.py:444:    - package util-linux-2.37.2-1.fc36.x86_64 requires /etc/pam.d/system-auth, but none of the providers can be installed
    DEBUG util.py:444:    - package gawk-5.1.1-1.fc36.x86_64 requires libm.so.6()(64bit), but none of the providers can be installed
    DEBUG util.py:444:    - package gawk-5.1.1-1.fc36.x86_64 requires libm.so.6(GLIBC_2.2.5)(64bit), but none of the providers can be installed
    DEBUG util.py:444:    - package gawk-5.1.1-1.fc36.x86_64 requires libm.so.6(GLIBC_2.29)(64bit), but none of the providers can be installed
    DEBUG util.py:444:    - package gawk-5.1.1-1.fc36.x86_64 requires rtld(GNU_HASH), but none of the providers can be installed
    DEBUG util.py:444:    - package gawk-5.1.1-1.fc36.x86_64 requires libc.so.6(GLIBC_2.34)(64bit), but none of the providers can be installed
    DEBUG util.py:444:    - conflicting requests
    
    I need to build the package again in rawhide, so this needs to be reverted
    for now.