fix(dynamodb): reject redundant condition-expression parentheses

[SergioChan]

Summary

• reject redundant boolean-group parentheses in DynamoDB condition expressions when the grouped clause does not change precedence (for example a OR (b AND c))
• raise InvalidConditionExpression with AWS-aligned message The expression has redundant parentheses;
• add regression coverage for both the rejected redundant case and an allowed precedence-changing case (a AND (b OR c))

Testing

• python -m pytest tests/test_dynamodb/test_dynamodb_condition_expressions.py -k "redundant_parentheses or allows_required_parentheses"
• python -m pytest tests/test_dynamodb/test_dynamodb_condition_expressions.py

Related

Fixes #9574

[bpandola]

This was already submitted (and merged) as #9847