Problem: memory leak in versiondb (backport: #1491)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37.39%. Comparing base (6169d92) to head (6db539a).

Additional details and impacted files

@@               Coverage Diff               @@
##           release/v1.3.x    #1493   +/-   ##
===============================================
  Coverage           37.39%   37.39%           
===============================================
  Files                 144      144           
  Lines               10280    10281    +1     
===============================================
+ Hits                 3844     3845    +1     
  Misses               5995     5995           
  Partials              441      441           

Files	Coverage Δ
versiondb/tsrocksdb/store.go	54.36% <100.00%> (+0.30%)	⬆️