go/consensus/tendermint: Don't panic on context cancellation

[kostko]

No description provided.

[codecov]

Codecov Report

Merging #2982 into master will increase coverage by 0.03%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master    #2982      +/-   ##
==========================================
+ Coverage   68.47%   68.51%   +0.03%     
==========================================
  Files         360      360              
  Lines       35285    35285              
==========================================
+ Hits        24161    24174      +13     
+ Misses       8023     8013      -10     
+ Partials     3101     3098       -3     

Impacted Files	Coverage Δ
go/consensus/tendermint/tendermint.go	64.18% <66.66%> (ø)
go/worker/compute/executor/committee/state.go	74.07% <0.00%> (-11.12%)	⬇️
go/consensus/tendermint/abci/state/state.go	61.53% <0.00%> (-7.70%)	⬇️
go/runtime/tagindexer/tagindexer.go	68.47% <0.00%> (-4.35%)	⬇️
go/runtime/host/protocol/connection.go	61.53% <0.00%> (-3.85%)	⬇️
go/worker/compute/txnscheduler/committee/node.go	62.76% <0.00%> (-2.11%)	⬇️
go/worker/compute/executor/committee/node.go	61.03% <0.00%> (-1.54%)	⬇️
go/runtime/client/client.go	72.26% <0.00%> (-1.46%)	⬇️
go/consensus/tendermint/abci/state.go	68.00% <0.00%> (-1.46%)	⬇️
go/storage/mkvs/iterator.go	84.37% <0.00%> (-1.25%)	⬇️
... and 25 more

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[Yawning]

Wow, was this issue just lurking there all along?