fix(controller): Increase readiness timeout from 1s to 30s

[alexec]

1s is too short under stress. I want to be cautious about restarting, hence 30s rather than a shorter time like 10s.

[codecov]

Codecov Report

Merging #6007 (b7fa185) into master (d7517cf) will increase coverage by 0.01%.
The diff coverage is n/a.

❗ Current head b7fa185 differs from pull request most recent head d903f13. Consider uploading reports for the commit d903f13 to get more accurate results

@@            Coverage Diff             @@
##           master    #6007      +/-   ##
==========================================
+ Coverage   47.33%   47.35%   +0.01%     
==========================================
  Files         248      248              
  Lines       15655    15655              
==========================================
+ Hits         7411     7413       +2     
+ Misses       7313     7312       -1     
+ Partials      931      930       -1     

Impacted Files	Coverage Δ
cmd/argo/commands/get.go	57.09% <0.00%> (+0.64%)	⬆️

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