refactor(batch): type response() method

[adriantomas]

Issue number: #3020

Summary

Changes

• Use PartialItemFailureReponse as the typing returned by response() of BasePartialBatchProcessor

User experience

Users using process_partial_response() and response() from BasePartialBatchProcessor will find that the returned response is the same.

Checklist

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• Meet tenets criteria
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• PR title follows conventional commit semantics

Acknowledgment

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[boring-cyborg]

Thanks a lot for your first contribution! Please check out our contributing guidelines and don't hesitate to ask whatever you need.
In the meantime, check out the #python channel on our Powertools for AWS Lambda Discord: Invite link

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (a884d9f) 96.56% compared to head (aa87ea6) 96.56%.
Report is 2 commits behind head on develop.

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Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3023   +/-   ##
========================================
  Coverage    96.56%   96.56%           
========================================
  Files          175      175           
  Lines         7825     7825           
  Branches      1476     1476           
========================================
  Hits          7556     7556           
  Misses         217      217           
  Partials        52       52           

Files Changed	Coverage Δ
aws_lambda_powertools/utilities/batch/base.py	94.21% <100.00%> (ø)

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[leandrodamascena]

You were so fast @adriantomas! Thanks a lot for this PR and your first contribution.

LGTM

[boring-cyborg]

Awesome work, congrats on your first merged pull request and thank you for helping improve everyone's experience!