feat: SMI TrafficSplit Support for Canary

[khhirani]

Closes #359

[codecov]

Codecov Report

Merging #520 into master will increase coverage by 0.21%.
The diff coverage is 95.21%.

@@            Coverage Diff             @@
##           master     #520      +/-   ##
==========================================
+ Coverage   85.66%   85.87%   +0.21%     
==========================================
  Files          85       86       +1     
  Lines        7923     8123     +200     
==========================================
+ Hits         6787     6976     +189     
- Misses        814      820       +6     
- Partials      322      327       +5     

Impacted Files	Coverage Δ
rollout/trafficrouting.go	93.10% <88.23%> (-2.73%)	⬇️
rollout/trafficrouting/smi/smi.go	95.21% <95.21%> (ø)
rollout/controller.go	73.33% <100.00%> (+0.29%)	⬆️

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[dthomson25]

Overall this looks great so far! There are some minor things that we need to work through but all in all good work!

[dthomson25]

I have a couple of comments but I think it's almost there!

[dthomson25]

Two very minor comments but otherwise LGTM! Great work!