Expose ParallelizationFactor prop for Kinesis Streams

[michael-ar]

What did you implement

Exposed the new ParallelizationFactor prop for Kinesis Streams.

Closes #7019

How can we verify it

This config should default the ParallelizationFactor to 1:

functions:
  preprocess:
    handler: handler.preprocess
    events:
      - stream:
          arn: arn:aws:kinesis:region:XXXXXX:stream/foo

This config should set the ParallelizationFactor to 10:

functions:
  preprocess:
    handler: handler.preprocess
    events:
      - stream:
          arn: arn:aws:kinesis:region:XXXXXX:stream/foo
          parallelizationFactor: 10

• Write and run all tests
• Write documentation
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES
Is it a breaking change?: NO

[codecov-io]

Codecov Report

Merging #7024 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #7024      +/-   ##
==========================================
+ Coverage   88.48%   88.48%   +<.01%     
==========================================
  Files         229      229              
  Lines        8416     8418       +2     
==========================================
+ Hits         7447     7449       +2     
  Misses        969      969

Impacted Files	Coverage Δ
...plugins/aws/package/compile/events/stream/index.js	98.78% <100%> (+0.03%)	⬆️

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[medikoo]

Looks great, Thank you @michael-ar !

[michael-ar]

@medikoo no worries, thanks for your speedy maintenance!