go/consensus/tendermint: Expose more P2P config params

[peterjgilbert]

Fixes #2597

TODO: Update sentry node config doc: https://docs.oasis.dev/operators/sentry-node.html#configuring-the-oasis-sentry-node

[codecov]

Codecov Report

Merging #2646 into master will decrease coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2646      +/-   ##
==========================================
- Coverage   62.99%   62.97%   -0.03%     
==========================================
  Files         365      364       -1     
  Lines       34378    34338      -40     
==========================================
- Hits        21658    21624      -34     
+ Misses      10047    10040       -7     
- Partials     2673     2674       +1

Impacted Files	Coverage Δ
go/consensus/tendermint/tendermint.go	66.2% <100%> (-0.74%)	⬇️
go/runtime/committee/committee.go	74.02% <0%> (-10.39%)	⬇️
go/consensus/api/grpc.go	57.02% <0%> (-6.62%)	⬇️
go/worker/storage/service_external.go	47.19% <0%> (-4.5%)	⬇️
go/oasis-node/cmd/identity/identity.go	47.36% <0%> (-2.64%)	⬇️
go/runtime/committee/nodes.go	80.64% <0%> (-2.16%)	⬇️
go/runtime/transaction/transaction.go	77.1% <0%> (-1.21%)	⬇️
go/worker/compute/executor/committee/node.go	61.66% <0%> (-1.19%)	⬇️
go/oasis-node/cmd/debug/tendermint/tendermint.go	11.36% <0%> (-1.14%)	⬇️
... and 9 more

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