Grammar for EIGRP metric weights

[progwriter]

Taking over #3240 that @mkremerbbn was working on.
Same content, with exception of making weights non-optional and linking to a doc. Could not find an example where weights are optional.

[batfish-bot]

This change is 

[progwriter]

Reviewable status: 0 of 8 files reviewed, all discussions resolved (waiting on @sfraint)

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projects/batfish/src/main/java/org/batfish/grammar/cisco/CiscoControlPlaneExtractor.java, line 10262 at r2 (raw file):

  @Nullable
  @SuppressWarnings("unused")

@sfraint some parameters are unused so keeping the suppress for now.

[codecov]

Codecov Report

Merging #3418 into master will decrease coverage by 0.01%.
The diff coverage is 62.5%.

@@             Coverage Diff              @@
##             master    #3418      +/-   ##
============================================
- Coverage     73.05%   73.03%   -0.02%     
+ Complexity    23597    23595       -2     
============================================
  Files          2045     2045              
  Lines         98841    98844       +3     
  Branches      11821    11820       -1     
============================================
- Hits          72204    72193      -11     
- Misses        21389    21400      +11     
- Partials       5248     5251       +3

Impacted Files	Coverage Δ	Complexity Δ
...fish/grammar/cisco/CiscoControlPlaneExtractor.java	66.28% <62.5%> (-0.07%)	1397 <2> (ø)
...c/main/java/org/batfish/dataplane/rib/RibTree.java	78.72% <0%> (-10.64%)	23% <0%> (-1%)
...in/java/org/batfish/dataplane/rib/AbstractRib.java	95.52% <0%> (-1.5%)	33% <0%> (-1%)
...col/src/main/java/org/batfish/role/InferRoles.java	90.62% <0%> (-0.4%)	68% <0%> (-1%)
...java/org/batfish/dataplane/ibdp/VirtualRouter.java	86.11% <0%> (-0.23%)	314% <0%> (-1%)
...src/main/java/org/batfish/coordinator/PoolMgr.java	65.16% <0%> (+1.12%)	16% <0%> (+1%)	⬆️

[sfraint]

Reviewed 4 of 7 files at r1, 4 of 4 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved