fix: filter new proxy when initializing proxy session at timeticksync

[chyezh]

issue: #40532

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 14.28571% with 6 lines in your changes missing coverage. Please review.

Project coverage is 80.56%. Comparing base (80f1d70) to head (da7f560). Report is 12 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/rootcoord/timeticksync.go	14.28%	5 Missing and 1 partial :warning:

:x: Your patch status has failed because the patch coverage (14.28%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #42831   +/-   ##
=======================================
  Coverage   80.55%   80.56%           
=======================================
  Files        1552     1552           
  Lines      221189   221199   +10     
=======================================
+ Hits       178172   178200   +28     
+ Misses      36640    36626   -14     
+ Partials     6377     6373    -4     

Components	Coverage Δ
Client	79.25% <ø> (ø)
Core	72.78% <ø> (+0.01%)	:arrow_up:
Go	82.11% <14.28%> (+<0.01%)	:arrow_up:

Files with missing lines	Coverage Δ
internal/rootcoord/timeticksync.go	85.61% <14.28%> (-3.36%)	:arrow_down:

... and 38 files with indirect coverage changes

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[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chyezh, czs007

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