Arista EOS do not treat vxlan multicast-groups as VTEPs

[arifogel]

• Fixes ARISTA: VXLAN multicast group misinterpreted as multicast flood group #8061
• Multicast-groups are not supported for BUM traffic on EOS up to at least 4.23
  • They are only for BM traffic, and should not displace unicast VTEPs
• Even on 4.25 which apparently allows multicast VTEPs, they are not configured
  via the multicast-group command.

[batfish-bot]

This change is 

[codecov]

Codecov Report

Merging #8085 (435a6cb) into master (60c419a) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #8085      +/-   ##
============================================
- Coverage     74.42%   74.40%   -0.02%     
+ Complexity    43118    43104      -14     
============================================
  Files          3362     3362              
  Lines        168869   168865       -4     
  Branches      20218    20217       -1     
============================================
- Hits         125686   125650      -36     
- Misses        33527    33552      +25     
- Partials       9656     9663       +7     

Impacted Files	Coverage Δ
...ish/representation/arista/AristaConfiguration.java	64.86% <ø> (-0.10%)	⬇️
.../datamodel/routing_policy/statement/Statement.java	72.72% <0.00%> (-9.10%)	⬇️
...src/main/java/org/batfish/coordinator/PoolMgr.java	54.76% <0.00%> (-4.77%)	⬇️
...fish/bddreachability/BDDLoopDetectionAnalysis.java	80.23% <0.00%> (-2.33%)	⬇️
...col/src/main/java/org/batfish/role/InferRoles.java	91.36% <0.00%> (-1.37%)	⬇️
...main/java/org/batfish/datamodel/acl/AclTracer.java	63.69% <0.00%> (-1.28%)	⬇️
...bddreachability/BDDReachabilityGraphOptimizer.java	82.82% <0.00%> (-1.02%)	⬇️
...ain/java/org/batfish/storage/FileBasedStorage.java	85.47% <0.00%> (-0.86%)	⬇️
...ain/java/org/batfish/coordinator/WorkQueueMgr.java	70.93% <0.00%> (-0.59%)	⬇️
...batfish/src/main/java/org/batfish/main/Driver.java	48.00% <0.00%> (-0.45%)	⬇️
... and 3 more

[dhalperi]

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @corinaminer)