What changes are being made and why?

The usage of instanceof has been standardized across the codebase.
This PR replaces traditional instanceof checks with pattern matching.
It improves code readability, removes redundant casts, and ensures consistent coding style.

How the changes have been QAed?

The changes have been QAed by running all existing unit tests to ensure no regressions.
Example scenario:

Object input = "example";
if (input instanceof String str) {
    System.out.println("Length: " + str.length());
}

This scenario was verified in cases where instanceof with pattern matching is used to ensure compatibility.

Setup Instructions

No special setup is required.

closes #6064