Refactor helper functions around attributes

[CohenArthur]

We should introduce some helper function here instead, I'm sure it would be reused elsewhere and it would ease this function a bit.
Probably within rust-attributes.cc since we already have some similar functions there ?

Originally posted by @P-E-P in #3289 (comment)

There are plenty of places where attributes are being checked or used and a lot of repetition is happening. We have just added an Attributes class to rust-attributes.cc, and it would be nice to collect functions related to attributes in that class.

[saeitoshi-10]

Hi, I am interested in working on this issue, but I am new here and need some guidance. Could you please point me to where the implementation for the attributes can be found in the codebase? Any relevant files, functions, or documentation would be really helpful.

Thank you for your time and support, and apologies if this is a basic question!

[saeitoshi-10]

@CohenArthur