bgpd: fix wrong event called when removing a set rule

bgpd: fix wrong event called when removing a set rule

The following route-map set rules events are destroyed with
the 'match_destroy' API whereas there is a 'set_destroy' API
available.
Fix this for the following set commands:
> set distance
> set extcommunity rt
> set extcommunity nt
> set extcommunity color
> set extcommunity soo

Fixes: 48cb7ea99d10 ("bgpd: North-bound implementation for bgp rmaps")
Fixes: c9a256144479 ("bgpd: Implement Node Target Extended Communities")
Fixes: b80ebc2d8cf0 ("bgpd: add colored extended communities support")
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>