mvcc/kvstore:fixcompactbug

[WIZARD-CXY]

fix issue #11392

[codecov-io]

Codecov Report

Merging #11400 into master will decrease coverage by 0.39%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #11400     +/-   ##
=========================================
- Coverage   64.74%   64.34%   -0.4%     
=========================================
  Files         403      403             
  Lines       37973    37974      +1     
=========================================
- Hits        24585    24436    -149     
- Misses      11761    11893    +132     
- Partials     1627     1645     +18

Impacted Files	Coverage Δ
mvcc/kvstore_compaction.go	90.24% <100%> (+0.24%)	⬆️
auth/options.go	47.5% <0%> (-45%)	⬇️
pkg/transport/timeout_conn.go	60% <0%> (-20%)	⬇️
clientv3/balancer/utils.go	88.46% <0%> (-11.54%)	⬇️
auth/simple_token.go	77.23% <0%> (-9.76%)	⬇️
pkg/netutil/netutil.go	63.11% <0%> (-7.38%)	⬇️
clientv3/naming/grpc.go	68.42% <0%> (-7.02%)	⬇️
lease/leasehttp/http.go	64.23% <0%> (-4.38%)	⬇️
proxy/grpcproxy/watch.go	88.75% <0%> (-4.15%)	⬇️
auth/store.go	62.32% <0%> (-3.58%)	⬇️
... and 17 more

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[jingyih]

LGTM