go/storage/mkvs: Skip already pruned nodes in migration

[kostko]

No description provided.

[codecov]

Codecov Report

Merging #3857 (d930398) into master (7b412c2) will increase coverage by 0.03%.
The diff coverage is 0.00%.

❗ Current head d930398 differs from pull request most recent head c6fbe21. Consider uploading reports for the commit c6fbe21 to get more accurate results

@@            Coverage Diff             @@
##           master    #3857      +/-   ##
==========================================
+ Coverage   67.06%   67.10%   +0.03%     
==========================================
  Files         404      404              
  Lines       41459    41453       -6     
==========================================
+ Hits        27806    27817      +11     
- Misses       9701     9704       +3     
+ Partials     3952     3932      -20     

Impacted Files	Coverage Δ
go/storage/mkvs/db/badger/migrate.go	55.29% <0.00%> (-0.30%)	⬇️
go/consensus/tendermint/full/services.go	75.83% <0.00%> (-8.34%)	⬇️
go/keymanager/client/client.go	73.68% <0.00%> (-7.90%)	⬇️
go/storage/api/root_cache.go	80.00% <0.00%> (-4.45%)	⬇️
go/storage/mkvs/tree.go	86.95% <0.00%> (-4.35%)	⬇️
go/consensus/tendermint/roothash/roothash.go	67.16% <0.00%> (-4.23%)	⬇️
...consensus/tendermint/apps/roothash/transactions.go	66.19% <0.00%> (-3.34%)	⬇️
go/consensus/tendermint/apps/beacon/state/state.go	71.42% <0.00%> (-3.18%)	⬇️
go/storage/mkvs/insert.go	87.67% <0.00%> (-2.74%)	⬇️
go/consensus/tendermint/abci/state.go	72.29% <0.00%> (-2.03%)	⬇️
... and 29 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7b412c2...c6fbe21. Read the comment docs.