Refine KV errors

[yah01]

/kind improvement
related #27490

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

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@yah01 ut workflow job failed, comment rerun ut can trigger the job again.

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@yah01 ut workflow job failed, comment rerun ut can trigger the job again.

[codecov]

Codecov Report

Merging #27588 (4a66ffc) into master (82b2edc) will increase coverage by 0.00%.
Report is 3 commits behind head on master.
The diff coverage is 90.90%.

@@           Coverage Diff           @@
##           master   #27588   +/-   ##
=======================================
  Coverage   81.51%   81.51%           
=======================================
  Files         805      805           
  Lines      114222   114215    -7     
=======================================
+ Hits        93103    93108    +5     
+ Misses      17981    17970   -11     
+ Partials     3138     3137    -1     

Files	Coverage Δ
internal/kv/etcd/embed_etcd_kv.go	83.41% <100.00%> (ø)
internal/kv/mem/mem_kv.go	72.64% <100.00%> (ø)
internal/kv/tikv/txn_tikv.go	83.12% <100.00%> (ø)
internal/metastore/kv/rootcoord/kv_catalog.go	87.61% <100.00%> (ø)
pkg/common/error.go	69.23% <ø> (-10.77%)	⬇️
internal/kv/etcd/etcd_kv.go	81.69% <66.66%> (ø)
internal/rootcoord/root_coord.go	90.01% <66.66%> (ø)

... and 21 files with indirect coverage changes

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[yah01]

/run-cpu-e2e

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[yah01]

/run-cpu-e2e

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[yah01]

/run-cpu-e2e

[congqixia]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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