Merge pull request #17431 from krishna-samy/bgpd_json_commits

bgpd: show json output changes to optimize various show commands

diff --cc bgpd/bgp_evpn_vty.c
Simple merge

diff --cc bgpd/bgp_nexthop.c
Simple merge

diff --cc bgpd/bgp_route.c
Simple merge

diff --cc bgpd/bgp_vty.c
Simple merge

diff --cc doc/user/bgp.rst
Simple merge