Add higress lua canary script

[SpecialYang]

Embed the default higress lua canary script.

[kruise-bot]

Welcome @SpecialYang! It looks like this is your first PR to openkruise/rollouts 🎉

[codecov-commenter]

Codecov Report

Merging #116 (6ff6a9a) into master (843e8b8) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##           master     #116   +/-   ##
=======================================
  Coverage   44.74%   44.74%           
=======================================
  Files          44       44           
  Lines        4519     4519           
=======================================
  Hits         2022     2022           
  Misses       2158     2158           
  Partials      339      339           

Flag	Coverage Δ
unittests	44.74% <ø> (ø)

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[zmberg]

/lgtm

[zmberg]

/approve

[kruise-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zmberg

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