Summary

This PR simplifies the Parser integration with the Batch processing API by making it more explicit on specifying configuration options and allowing better error handling

Changes

Please provide a summary of what's being changed

• Refactored to make the parsing code path a sub-path export available under `@aws-lambda-powertools/batch/parser';
• Changed the config options of BatchProcessor to accept a parser function, and a mutually exclusive schema or innerSchema, as well as optional transformer, and logger
• Refactored to parsing to do the parsing just once based on the config options passed
• Implemented error handling and logging for parsing errors
• Updated the tests for the feature

Please add the issue number below, if no issue is present the PR might get blocked and not be reviewed

Issue number: closes #4453

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