enhance: use the key lock and concurrent map in the msg dispatcher client

[SimFG]

trafficstars

/kind improvement

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[SimFG]

rerun ut

[mergify[bot]]

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

[SimFG]

/run-cpu-e2e

[SimFG]

rerun ut

[mergify[bot]]

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

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 80.87%. Comparing base (7611128) to head (4ccaab1). Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #34278      +/-   ##
==========================================
- Coverage   80.92%   80.87%   -0.06%     
==========================================
  Files        1113     1114       +1     
  Lines      138345   138507     +162     
==========================================
+ Hits       111960   112019      +59     
- Misses      22145    22235      +90     
- Partials     4240     4253      +13     

Files	Coverage Δ
pkg/mq/msgdispatcher/client.go	100.00% <100.00%> (ø)

... and 34 files with indirect coverage changes

[SimFG]

/run-cpu-e2e

[SimFG]

/run-cpu-e2e

[SimFG]

/run-cpu-e2e

[yellow-shine]

/run-cpu-e2e

[yellow-shine]

/run-cpu-e2e

[bigsheeper]

/lgtm

[bigsheeper]

/lgtm