fix: increase timeout ready for executor docker images

[ZiniuYu]

ViT-g/h and M-CLIP models usually take longer to download and have a high chance to timeout at the starting stage. This pr increases timeout_ready to 3000000ms

[codecov]

Codecov Report

Merging #854 (bb0e6a5) into main (f96ce54) will increase coverage by 2.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #854      +/-   ##
==========================================
+ Coverage   79.32%   81.39%   +2.06%     
==========================================
  Files          21       21              
  Lines        1596     1596              
==========================================
+ Hits         1266     1299      +33     
+ Misses        330      297      -33     

Flag	Coverage Δ
cas	81.39% <ø> (+2.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
server/clip_server/model/clip_trt.py	85.71% <0.00%> (+16.32%)	⬆️
server/clip_server/model/trt_utils.py	83.51% <0.00%> (+27.47%)	⬆️

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[numb3r3]

LGTM