NotSame should fail if args are not pointers #1661

[sikehish]

Summary

Reduces the confusion assosciated with NotSame that previously would check nothing if any of the values is not a pointer. The changes made were tested using TestSame, TestNotSame, and Test_samePointers tests, and the changes did clear the tests.

Changes

1. Modified samePointers to return another bool value(ok) that would determine if the 2 values are of pointer type or not, while the returned "same" bool value would determine if the 2 pointers are same.
2. Modified assert.NotSame to call Fail() if the 2 values are either i)pointers pointing to the same address or ii)either/both of the values are not pointers.
3. Modified assert.Same to call Fail() if the 2 values are either i)pointers not pointing to the same address or ii)either/both of the values are not pointers.
4. Modified Test_samePointers to handle the new behavior of samePointers by checking both if the inputs are pointers (ok) and if they point to the same object (same).

Motivation

Ensure NotSame accurately verifies pointer sameness by handling non-pointer inputs explicitly, improving clarity and reducing potential misuse.

Related issues

Closes #1661