Inaccurate pipeline show information

[tatry]

1. nikss-ctl shows TC hook type for XDP-based pipeline.
2. ~In XDP-based pipeline has always egress program (TBC with compiler code).~
3. Some object are shown which should be hidden in output JSON. To avoid this in the future maybe we should hide all names starting from ebpf_ and use this prefix in the generated programs by p4c compiler? As far I remember this prefix is reserved for such usage.

Output from PTF test upf.UPFTest: Configuration:

Using test params: {'interfaces': 'psa_recirc,eth0,eth1,eth2,eth3,eth4,eth5', 'namespace': 'switch', 'trace': 'False', 'xdp': 'True', 'xdp2tc': 'meta'}
P4ARGS=--Wdisable=unused --max-ternary-masks 3 -DPORT0=4 -DPORT1=5 -DPORT2=6 -DPORT3=7 -DPORT4=8 -DPORT5=9 -DPSA_RECIRC=2 --xdp2tc=meta --xdp 

Pipeline show information:

{
    "pipeline": {
        "id": 1,
        "load_time": "2022-12-01T09:35:42+0100",
        "bpf_hook": "TC",
        "has_egress_program": false,
        "ports": [
            {
                "name": "eth0",
                "port_id": 4
            },
            {
                "name": "eth1",
                "port_id": 5
            },
            {
                "name": "eth2",
                "port_id": 6
            },
            {
                "name": "eth3",
                "port_id": 7
            },
            {
                "name": "eth4",
                "port_id": 8
            },
            {
                "name": "eth5",
                "port_id": 9
            }
        ],
        "objects": [
            "xdp2tc_shared_map",
            "ingress_upf_process_ingress_l4port_ingress_l4_src_port",
            "ingress_upf_process_ingress_l4port_ingress_l4_dst_port",
            "ingress_upf_ingress_source_interface_lookup_by_port",
            "ingress_upf_ingress_session_lookup_by_ue_ip",
            "ingress_upf_ingress_session_lookup_by_teid",
            "ingress_upf_ingress_pdr_lookup",
            "ingress_upf_ingress_far_lookup",
            "ingress_ip_forward_ipv4_lpm",
            "tx_port",
            "crc_lookup_tbl",
            "ingress_upf_process_ingress_l4port_ingress_l4port_fields"
        ]
    }
}