bgpd: cleanup macip_path_list for remote macip

bgpd: cleanup macip_path_list for remote macip

ASAN reported the following memleak:
```
Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x4d4342 in calloc (/usr/lib/frr/bgpd+0x4d4342)
    #1 0xbc3d68 in qcalloc /home/sharpd/frr8/lib/memory.c:116:27
    #2 0xb869f7 in list_new /home/sharpd/frr8/lib/linklist.c:64:9
    #3 0x5a38bc in bgp_evpn_remote_ip_hash_alloc /home/sharpd/frr8/bgpd/bgp_evpn.c:6789:24
    #4 0xb358d3 in hash_get /home/sharpd/frr8/lib/hash.c:162:13
    #5 0x593d39 in bgp_evpn_remote_ip_hash_add /home/sharpd/frr8/bgpd/bgp_evpn.c:6881:7
    #6 0x59dbbd in install_evpn_route_entry_in_vni_common /home/sharpd/frr8/bgpd/bgp_evpn.c:3049:2
    #7 0x59cfe0 in install_evpn_route_entry_in_vni_ip /home/sharpd/frr8/bgpd/bgp_evpn.c:3126:8
    #8 0x59c6f0 in install_evpn_route_entry /home/sharpd/frr8/bgpd/bgp_evpn.c:3318:8
    #9 0x59bb52 in install_uninstall_route_in_vnis /home/sharpd/frr8/bgpd/bgp_evpn.c:3888:10
    #10 0x59b6d2 in bgp_evpn_install_uninstall_table /home/sharpd/frr8/bgpd/bgp_evpn.c:4019:5
    #11 0x578857 in install_uninstall_evpn_route /home/sharpd/frr8/bgpd/bgp_evpn.c:4051:9
    #12 0x58ada6 in bgp_evpn_import_route /home/sharpd/frr8/bgpd/bgp_evpn.c:6049:9
    #13 0x713794 in bgp_update /home/sharpd/frr8/bgpd/bgp_route.c:4842:3
    #14 0x583fa0 in process_type2_route /home/sharpd/frr8/bgpd/bgp_evpn.c:4518:9
    #15 0x5824ba in bgp_nlri_parse_evpn /home/sharpd/frr8/bgpd/bgp_evpn.c:5732:8
    #16 0x6ae6a2 in bgp_nlri_parse /home/sharpd/frr8/bgpd/bgp_packet.c:363:10
    #17 0x6be6fa in bgp_update_receive /home/sharpd/frr8/bgpd/bgp_packet.c:2020:15
    #18 0x6b7433 in bgp_process_packet /home/sharpd/frr8/bgpd/bgp_packet.c:2929:11
    #19 0xd00146 in thread_call /home/sharpd/frr8/lib/thread.c:2006:2
```

The list itself was not being cleaned up when the final list entry was
removed, so make sure we do that instead of leaking memory.

Signed-off-by: Trey Aspelund <taspelund@nvidia.com>