go/oasis-node: Don't bypass Stop in newNode failure handler

[kostko]

Missed this in #2964 😞

[codecov]

Codecov Report

Merging #2966 into master will increase coverage by 0.07%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master    #2966      +/-   ##
==========================================
+ Coverage   68.30%   68.37%   +0.07%     
==========================================
  Files         361      361              
  Lines       35231    35231              
==========================================
+ Hits        24065    24090      +25     
+ Misses       8057     8036      -21     
+ Partials     3109     3105       -4     

Impacted Files	Coverage Δ
go/oasis-node/cmd/node/node.go	54.88% <75.00%> (+0.46%)	⬆️
go/storage/metrics.go	78.26% <0.00%> (-9.79%)	⬇️
go/storage/api/root_cache.go	70.11% <0.00%> (-4.60%)	⬇️
.../consensus/tendermint/apps/epochtime_mock/state.go	78.72% <0.00%> (-4.26%)	⬇️
go/storage/mkvs/tree.go	89.28% <0.00%> (-3.58%)	⬇️
go/storage/database/database.go	70.58% <0.00%> (-3.37%)	⬇️
go/storage/mkvs/lookup.go	73.46% <0.00%> (-2.05%)	⬇️
go/storage/mkvs/syncer/proof.go	83.92% <0.00%> (-1.79%)	⬇️
go/consensus/tendermint/apps/staking/fees.go	45.98% <0.00%> (-1.46%)	⬇️
go/consensus/tendermint/apps/staking/staking.go	54.28% <0.00%> (-1.43%)	⬇️
... and 24 more

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