Drop dhcp-client dependendencies from modular build
    
    ISC DHCP implementation is going to be deprecated soon in favor of
    NetworkManager and all spins but modular switched to using NM already.
    Dropping dhcp-client from the modular build as well and re-enable NM
    service
    
    Bug-Url: https://bugzilla.redhat.com/1845933
    Signed-off-by: Pavel Zhukov <pzhukov@redhat.com>