bgpd: Show applied route-map attributes for `neighbor X advertised-routes detail`

If we have a route-map that sets some attributes e.g. community or large-community,
and the route-map is applied for outgoing direction, everything is fine, but
we missed the point that `advertised-routes detail` was not using the applied
attributes to display and instead it uses what is received from the peer (original).

Let's fix this, and use what's already applied (advertise attributes), and
we can now see:

```
route-map r3 permit 10
 match ip address prefix-list p1
 set community 65001:65002
 set extcommunity bandwidth 100
 set large-community 65001:65002:65003
exit
!
...
 address-family ipv4 unicast
  neighbor 192.168.2.3 route-map r3 out
 exit-address-family
...
```

The output:

```
r2# show bgp ipv4 neighbors 192.168.2.3 advertised-routes detail
BGP table version is 1, local router ID is 192.168.2.2, vrf id 0
Default local pref 100, local AS 65002
BGP routing table entry for 10.10.10.1/32, version 1
Paths: (1 available, best #1, table default)
  Advertised to non peer-group peers:
  192.168.1.1 192.168.2.3
  65001
    0.0.0.0 from 192.168.1.1 (192.168.1.1)
      Origin IGP, valid, external, best (First path received)
      Community: 65001:65002
      Extended Community: LB:65002:12500000 (100.000 Mbps)
      Large Community: 65001:65002:65003
      Last update: Thu Dec 19 17:00:40 2024
```

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>

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