go/runtime/scheduling: Allow a higher priority tx even if queue full

[kostko]

No description provided.

[codecov]

Codecov Report

Merging #4431 (1d0a729) into master (b46166c) will increase coverage by 0.08%.
The diff coverage is 85.18%.

❗ Current head 1d0a729 differs from pull request most recent head 1ef5b76. Consider uploading reports for the commit 1ef5b76 to get more accurate results

@@            Coverage Diff             @@
##           master    #4431      +/-   ##
==========================================
+ Coverage   68.76%   68.84%   +0.08%     
==========================================
  Files         414      414              
  Lines       46257    46273      +16     
==========================================
+ Hits        31807    31856      +49     
+ Misses      10539    10504      -35     
- Partials     3911     3913       +2     

Impacted Files	Coverage Δ
...ling/simple/txpool/priorityqueue/priority_queue.go	88.15% <85.18%> (+1.39%)	⬆️
...ensus/tendermint/apps/staking/proposing_rewards.go	56.75% <0.00%> (-5.41%)	⬇️
...nsensus/tendermint/apps/keymanager/transactions.go	50.00% <0.00%> (-2.95%)	⬇️
go/keymanager/client/client.go	78.51% <0.00%> (-2.48%)	⬇️
go/consensus/api/submission.go	66.66% <0.00%> (-2.39%)	⬇️
go/runtime/host/protocol/connection.go	70.65% <0.00%> (-2.32%)	⬇️
go/runtime/registry/host.go	75.72% <0.00%> (-1.95%)	⬇️
go/worker/beacon/worker_vrf.go	64.34% <0.00%> (-1.74%)	⬇️
go/oasis-node/cmd/node/node.go	54.59% <0.00%> (-1.74%)	⬇️
go/storage/client/client.go	83.57% <0.00%> (-1.43%)	⬇️
... and 25 more

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