Refactor the logic in the bug_to_types function and extract it from the bugtype model file

[suhaibmujahid]

The logic in bug_to_types could be refactored to better fit our use case. These are the main points:

• It would be best to avoid creating models that depend on each other. If there is a need to modify the logic in the bugtype model, it might not be apparent that other models will be affected. Therefore, it is better to keep the common logic separate from the model file.
• We don't need to check all types in this case, just the performance type. So, we can split the function and only use the part that detects if the bug is related to performance.

Originally posted by @suhaibmujahid in #3895 (comment)