bgpd: evpn route detail json display non prett

bgpd: evpn route detail json display non prett

For BGP evpn route table detail json to use
non pretty form of display.

Problem:
In scaled evpn route table detail json dump
occupies high resources (CPU + memory) of the system.
In high scale evpn route dump using pretty form
hogs CPU for a while which can trigger watchfrr
to kill bgpd.

Solution:
Avoid pretty JSON print for detail version dump

Signed-off-by: Chirag Shah <chirag@nvidia.com>