Minor fix for timer usage

[Shaddoll]

What changed?
Drain a timer before reset

Why?
Before go 1.23, the safe way to reset a timer is to drain it before resetting it. This is to set a pattern and reminder for us.

How did you test it?
existing unit tests

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 73.21%. Comparing base (16c5e64) to head (f7fcac4).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
service/history/queue/timer_gate.go	85.71%	1 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
service/history/queue/timer_gate.go	93.18% <85.71%> (-3.25%)	⬇️

... and 4 files with indirect coverage changes

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