Specialize bgp and evpn rib questions

[ratulm]

Specialize the routes question for BGP and EVPN ribs. The questions have different columns in the answer tables, which are otherwise not visible in the documentation and left users wondering how they get BGP-specific fields.

[batfish-bot]

This change is 

[codecov]

Codecov Report

Merging #6795 (a76faa7) into master (5bd17b1) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #6795      +/-   ##
============================================
- Coverage     69.93%   69.91%   -0.02%     
+ Complexity    36294    36282      -12     
============================================
  Files          3026     3026              
  Lines        153390   153390              
  Branches      18417    18417              
============================================
- Hits         107274   107244      -30     
- Misses        37505    37525      +20     
- Partials       8611     8621      +10     

Impacted Files	Coverage Δ	Complexity Δ
.../datamodel/routing_policy/statement/Statement.java	72.72% <0.00%> (-9.10%)	6.00% <0.00%> (-1.00%)
...rg/batfish/identifiers/StorageBasedIdResolver.java	85.29% <0.00%> (-5.89%)	22.00% <0.00%> (ø%)
.../org/batfish/dataplane/rib/RouteAdvertisement.java	83.67% <0.00%> (-4.09%)	18.00% <0.00%> (-1.00%)
...col/src/main/java/org/batfish/role/InferRoles.java	89.09% <0.00%> (-1.82%)	49.00% <0.00%> (-2.00%)
...main/java/org/batfish/datamodel/acl/AclTracer.java	62.89% <0.00%> (-1.26%)	43.00% <0.00%> (-1.00%)
...src/main/java/org/batfish/coordinator/PoolMgr.java	59.52% <0.00%> (-1.20%)	15.00% <0.00%> (-1.00%)
...ain/java/org/batfish/storage/FileBasedStorage.java	84.50% <0.00%> (-0.93%)	249.00% <0.00%> (ø%)
...src/main/java/org/batfish/coordinator/WorkMgr.java	75.42% <0.00%> (-0.70%)	245.00% <0.00%> (-3.00%)
...java/org/batfish/dataplane/ibdp/VirtualRouter.java	90.50% <0.00%> (-0.31%)	210.00% <0.00%> (-1.00%)

[saparikh]

Reviewed 3 of 5 files at r1, 2 of 2 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved