bgpd: bmp loc-rib RFC9069 compliant monitoring messages

bgpd: bmp loc-rib RFC9069 compliant monitoring messages

set field peer bgp id to the peer's remote id in every case except loc-rib (RFC9069 case) in which we put the bgp instance's router-id if available or 0-filled if not available
set field peer asn to local primary bgp asn in case of loc-rib instance (RFC9069) else it's set to the peer's asn
set field peer address to 0 in loc-rib instance (RFC9069 case) and to the peer's address in other cases
had to pass struct bgp reference to bmp_per_peer_hdr to access router-id and such, but it's always safely accessed when used

Signed-off-by: Maxence Younsi <mx.yns@outlook.fr>