go/consensus/tendermint: Bump Tendermint Core to v0.34.8-oasis1

[kostko]

No description provided.

[codecov]

Codecov Report

Merging #3786 (aadfb77) into master (9784de1) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3786      +/-   ##
==========================================
- Coverage   67.36%   67.34%   -0.02%     
==========================================
  Files         401      401              
  Lines       40662    40656       -6     
==========================================
- Hits        27391    27381      -10     
- Misses       9417     9418       +1     
- Partials     3854     3857       +3     

Impacted Files	Coverage Δ
go/common/grpc/policy/policy.go	62.12% <0.00%> (-7.58%)	⬇️
go/storage/mkvs/insert.go	87.67% <0.00%> (-4.11%)	⬇️
go/consensus/tendermint/full/light.go	48.00% <0.00%> (-4.00%)	⬇️
...nt/apps/supplementarysanity/supplementarysanity.go	80.39% <0.00%> (-3.93%)	⬇️
go/worker/common/committee/node.go	70.61% <0.00%> (-3.61%)	⬇️
...consensus/tendermint/apps/registry/transactions.go	56.98% <0.00%> (-1.81%)	⬇️
go/keymanager/client/client.go	77.19% <0.00%> (-1.76%)	⬇️
go/consensus/tendermint/abci/mux.go	59.24% <0.00%> (-1.14%)	⬇️
...nsus/tendermint/apps/supplementarysanity/checks.go	41.71% <0.00%> (-1.07%)	⬇️
.../consensus/tendermint/apps/registry/state/state.go	56.70% <0.00%> (-0.61%)	⬇️
... and 10 more

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