IOS: fix tracking of ip pim ssm range

[dhalperi]

1. IOS does not allow prefix, just std ACL
2. Rewrite grammar slightly to be LL1.

Fix #8287

commit-id:6145b413

Issue references:

• Fix ACL incorrectly flagged as unused in Cisco IOSXE > ip pim #8287

[batfish-bot]

This change is 

[codecov]

Codecov Report

Merging #8293 (c0c4d3a) into master (85f78d9) will decrease coverage by 0.00%.
The diff coverage is 83.33%.

@@             Coverage Diff              @@
##             master    #8293      +/-   ##
============================================
- Coverage     74.59%   74.58%   -0.01%     
+ Complexity    43832    43824       -8     
============================================
  Files          3407     3407              
  Lines        169702   169703       +1     
  Branches      20294    20294              
============================================
- Hits         126581   126572       -9     
- Misses        33528    33535       +7     
- Partials       9593     9596       +3     

Impacted Files	Coverage Δ
...fish/grammar/cisco/CiscoControlPlaneExtractor.java	62.75% <80.00%> (ø)
...fish/representation/cisco/CiscoStructureUsage.java	100.00% <100.00%> (ø)
.../datamodel/routing_policy/statement/Statement.java	72.72% <0.00%> (-9.10%)	⬇️
...fish/bddreachability/BDDLoopDetectionAnalysis.java	83.82% <0.00%> (-2.95%)	⬇️
...src/main/java/org/batfish/coordinator/PoolMgr.java	59.52% <0.00%> (-1.20%)	⬇️
...bddreachability/BDDReachabilityGraphOptimizer.java	82.82% <0.00%> (-1.02%)	⬇️
...batfish/src/main/java/org/batfish/main/Driver.java	49.18% <0.00%> (-0.55%)	⬇️
...rg/batfish/dataplane/ibdp/EigrpRoutingProcess.java	89.08% <0.00%> (-0.36%)	⬇️
...src/main/java/org/batfish/coordinator/WorkMgr.java	75.81% <0.00%> (-0.16%)	⬇️

[arifogel]

Reviewed 7 of 7 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @sfraint)