fix: make NewDataSyncService idempotent of dispatcher

[chyezh]

issue: #37547

[sre-ci-robot]

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[mergify]

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.13%. Comparing base (2630717) to head (ee1cfa2).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #37576      +/-   ##
==========================================
- Coverage   68.15%   68.13%   -0.02%     
==========================================
  Files         290      290              
  Lines       25392    25392              
==========================================
- Hits        17306    17302       -4     
- Misses       8086     8090       +4     

Components	Coverage Δ
Client	∅ <ø> (∅)
Core	68.13% <ø> (-0.02%)	⬇️
Go	∅ <ø> (∅)

see 1 file with indirect coverage changes

[chyezh]

/run-cpu-e2e

[bigsheeper]

/lgtm

[mergify]

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

[chyezh]

/run-cpu-e2e

[chyezh]

/run-cpu-e2e

[chyezh]

/run-cpu-e2e

[chyezh]

/run-cpu-e2e

[sre-ci-robot]

New changes are detected. LGTM label has been removed.

[chyezh]

rerun ut