Lib_ppx_profiler: Revert the attribute list before preprocessing it

What

Revert the attribute list before preprocessing it (fixes #7500 (closed))

Why

As of now, preprocessing

() [@profiler.record "a"] [@profiler.record "b"]

Will generate

Profiler.record "b";
Profiler.record "a";
()

Which may be considered as bad UX.

How

Manually testing the MR

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR