PDM-236 Add support for product level attributes

[peter-gerhard]

https://commercetools.atlassian.net/browse/PDM-236

Add Support for importing products, product drafts with product level attributes

• Add Action Generation for Product Level Attributes on Products
  • Refactor while keeping tests green
  • Add logic for product level attribute actions
  • Add tests for product level attribute actions and get them green
• Add Action Generation for Product Level Attributes on Product-Types
  • The only action affected is addAttributeDefinition which takes a definition. By adding the level to the raml (other repo) it will automatically work to import product types with product level attributes

I suggest t review commit by commit to get a more meaningful diff

[changeset-bot]

🦋 Changeset detected

Latest commit: 9d826de

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@commercetools/sync-actions	Minor

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[codecov]

Codecov Report

Attention: Patch coverage is 89.70588% with 7 lines in your changes missing coverage. Please review.

Project coverage is 98.47%. Comparing base (e91cb18) to head (9d826de).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
packages/sync-actions/src/product-actions.js	89.39%	5 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1969      +/-   ##
==========================================
- Coverage   98.58%   98.47%   -0.12%     
==========================================
  Files         117      117              
  Lines        2968     3013      +45     
  Branches      834      854      +20     
==========================================
+ Hits         2926     2967      +41     
- Misses         40       42       +2     
- Partials        2        4       +2     

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