go/consensus: Add SubmitTxNoWait method

[kostko]

Fixes #3152

The new method allows submitting a transaction without waiting for it to be
included in a block.

[codecov]

Codecov Report

Merging #3153 into master will decrease coverage by 0.23%.
The diff coverage is 76.92%.

@@            Coverage Diff             @@
##           master    #3153      +/-   ##
==========================================
- Coverage   68.75%   68.51%   -0.24%     
==========================================
  Files         383      383              
  Lines       37412    37438      +26     
==========================================
- Hits        25721    25651      -70     
- Misses       8414     8511      +97     
+ Partials     3277     3276       -1     

Impacted Files	Coverage Δ
go/consensus/api/api.go	38.09% <ø> (ø)
go/consensus/api/base.go	2.77% <0.00%> (-0.08%)	⬇️
go/consensus/api/grpc.go	66.66% <71.42%> (-1.63%)	⬇️
go/consensus/tendermint/full/light.go	63.15% <100.00%> (+2.04%)	⬆️
go/consensus/tests/tester.go	97.97% <100.00%> (+0.17%)	⬆️
go/runtime/host/sandbox/sandbox.go	67.28% <0.00%> (-10.04%)	⬇️
go/consensus/tendermint/api/api.go	80.64% <0.00%> (-8.61%)	⬇️
go/consensus/tendermint/epochtime/epochtime.go	78.78% <0.00%> (-7.58%)	⬇️
go/worker/common/p2p/dispatch.go	71.96% <0.00%> (-7.48%)	⬇️
go/common/grpc/policy/policy.go	64.38% <0.00%> (-6.85%)	⬇️
... and 29 more

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[Yawning]

Do we need another call for this vs just adding an argument to the existing method?

[kostko]

Do we need another call for this vs just adding an argument to the existing method?

Yeah thought about that, but the blocking SubmitTx should only be available over the non-light interface (as it requires state and some more resources to track the transaction) and having a separate method makes it easier to split the two between interfaces.