AWS API Optimization - Update

[eytan-avisror]

Ref #112

This refactors the update flow to remove redundant API calls

• BDD Passing

[codecov]

Codecov Report

Merging #124 into master will increase coverage by 1.00%.
The diff coverage is 90.66%.

@@            Coverage Diff             @@
##           master     #124      +/-   ##
==========================================
+ Coverage   87.59%   88.60%   +1.00%     
==========================================
  Files          10       10              
  Lines        1072     1123      +51     
==========================================
+ Hits          939      995      +56     
+ Misses         96       91       -5     
  Partials       37       37              

Impacted Files	Coverage Δ
controllers/provisioners/eks/helpers.go	85.94% <71.42%> (+2.99%)	⬆️
controllers/provisioners/eks/cloud.go	89.70% <75.00%> (-0.92%)	⬇️
controllers/provisioners/eks/update.go	98.01% <94.82%> (-0.74%)	⬇️
controllers/provisioners/eks/upgrade.go	94.80% <100.00%> (+0.06%)	⬆️

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