ci: don't automatically retry timed out jobs

[ptrus]

Apparently jobs that timeout exit with status 255 and those shouldn't be automatically retried.

As noted before (#2900) 125 is actually the only error we want to automatically retry.

[codecov]

Codecov Report

Merging #3036 into master will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3036      +/-   ##
==========================================
+ Coverage   68.47%   68.54%   +0.07%     
==========================================
  Files         367      367              
  Lines       36238    36238              
==========================================
+ Hits        24813    24840      +27     
+ Misses       8225     8210      -15     
+ Partials     3200     3188      -12     

Impacted Files	Coverage Δ
go/consensus/tendermint/api/errors.go	86.66% <0.00%> (-13.34%)	⬇️
...ompute/txnscheduler/algorithm/batching/batching.go	78.66% <0.00%> (-6.67%)	⬇️
go/common/cbor/codec.go	78.37% <0.00%> (-5.41%)	⬇️
go/common/grpc/proxy/proxy.go	62.60% <0.00%> (-5.22%)	⬇️
go/worker/common/p2p/p2p.go	64.41% <0.00%> (-4.51%)	⬇️
go/consensus/tendermint/apps/staking/state/gas.go	77.58% <0.00%> (-3.45%)	⬇️
go/consensus/tendermint/roothash/roothash.go	66.47% <0.00%> (-2.03%)	⬇️
go/worker/compute/txnscheduler/committee/node.go	61.26% <0.00%> (-1.21%)	⬇️
go/runtime/client/client.go	72.26% <0.00%> (-0.73%)	⬇️
go/storage/api/grpc.go	66.88% <0.00%> (-0.67%)	⬇️
... and 21 more

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