MLIBZ-3022: Multi-Record Insert

[heyzooi]

Description

Multi-Record Insert implementation

Changes

• DataStore, new SaveMultiOperation and code around it

Tests

• Unit Tests:
  • Happy Path (saving an array of items)
  • Trying to save the same _id
  • Trying to save an empty array
  • Saving exactly 100 records
  • Saving more than 100 records

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (develop@69e560e). Click here to learn what that means.
The diff coverage is 83.82%.

@@            Coverage Diff            @@
##             develop    #359   +/-   ##
=========================================
  Coverage           ?   86.2%           
=========================================
  Files              ?      72           
  Lines              ?    9775           
  Branches           ?       0           
=========================================
  Hits               ?    8427           
  Misses             ?    1348           
  Partials           ?       0

Flag	Coverage Δ
#Mac	84.48% <83.82%> (?)
#iOS	85.97% <83.82%> (?)

Impacted Files	Coverage Δ
Kinvey/Kinvey/ObjectMapperJSONParser.swift	0% <0%> (ø)
Kinvey/Kinvey/Kinvey.swift	93.12% <100%> (ø)
Kinvey/Kinvey/DataStore.swift	79.89% <100%> (ø)
Kinvey/Kinvey/HttpRequest.swift	89.26% <100%> (ø)
Kinvey/Kinvey/JSONParser.swift	86.41% <100%> (ø)
Kinvey/Kinvey/Error.swift	89.56% <100%> (ø)
Kinvey/Kinvey/HttpResponse.swift	79.54% <100%> (ø)
Kinvey/Kinvey/HttpRequestFactory.swift	86.67% <100%> (ø)
Kinvey/Kinvey/RealmCache.swift	91.2% <100%> (ø)
Kinvey/Kinvey/Cache.swift	85.88% <100%> (ø)
... and 2 more

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[vinaygahlawat]

Overall LGTM. Per our side conversation, please add in the handling of an array of entities that are a mix of both creates and updates before we merge this PR.