CI: Modify suppression file for c-ares-1.15.0
    
    Valgrind does not generate full stack trace for errors.
    It is just limited amount of frames. Therefore we cannot see main
    function with the new c-ares.
    
    The suppression file generated with c-ares-1.14.0
    {
       <insert_a_suppression_name_here>
       Memcheck:Leak
       match-leak-kinds: possible
       fun:malloc
       fun:strdup
       fun:ares_init_options
       fun:recreate_ares_channel
       fun:resolv_init
       fun:be_res_init
       fun:be_res_init
       fun:be_init_failover
       fun:test_ipa_server_create_trusts_setup
       obj:/usr/lib64/libcmocka.so.0.5.1
       fun:_cmocka_run_group_tests
       fun:main
    }
    
    The suppression file generated with c-ares-1.15.0
    {
       <insert_a_suppression_name_here>
       Memcheck:Leak
       match-leak-kinds: possible
       fun:malloc
       fun:strdup
       obj:/usr/lib64/libcares.so.2.3.0
       obj:/usr/lib64/libcares.so.2.3.0
       fun:ares_init_options
       fun:recreate_ares_channel
       fun:resolv_init
       fun:be_res_init
       fun:be_res_init
       fun:be_init_failover
       fun:test_ipa_server_create_trusts_setup
       obj:/usr/lib64/libcmocka.so.0.5.1
       fun:_cmocka_run_group_tests
    }
    
    Merges: https://pagure.io/SSSD/sssd/pull-request/3884
    
    Reviewed-by: Sumit Bose <sbose@redhat.com>