[file_crash_bug] Fix detecting addresses with near allocator poison values

[suhaibmujahid]

Fixes #2258

It's a stupid bug where the constant gets created as a generator instead of a tuple. As a result, the first time we call the is_near_allocator_address() function, we get a correct result, but subsequent calls always return False.

Checklist

• Type annotations added to new functions
• Docs added to functions touched in main classes
• Dry-run produced the expected results
• The to-be-announced tag added if this is worth announcing