Add case-sensitive support for equality deletes in DeleteFilter

[slfan1989]

Background

Currently, DeleteFilter binds equality delete predicates in a case-insensitive manner, and the code contains a TODO note about handling case sensitivity.

Goal

• Add support for optional case-sensitive matching for equality deletes in DeleteFilter.
• Provide a configuration or parameter to control whether case-sensitive matching is enabled.
• Update or add unit tests to cover both case-sensitive and case-insensitive scenarios.

Benefits

• Improves flexibility and correctness of DeleteFilter in different use cases.
• Allows users to choose between case-sensitive or case-insensitive matching based on their needs.