add --refresh-iam-interval flag to the gateway

[zhijian-pro]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 55.55%. Comparing base (b46fac4) to head (04a635b).

Files	Patch %	Lines
cmd/gateway.go	57.14%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4593      +/-   ##
==========================================
+ Coverage   55.54%   55.55%   +0.01%     
==========================================
  Files         159      159              
  Lines       42940    42947       +7     
==========================================
+ Hits        23849    23859      +10     
+ Misses      16431    16425       -6     
- Partials     2660     2663       +3     

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