Refactor Profile API - new ProfileData class

Using an object to handle Profiles avoids repeated SQL queries to
retrieve the same Profile information from the database.

This initial implementation only supports read-only operations for now;
add, update and delete are still managed with legacy functions.

These 3 functions have been replaced by ProfileData methods, which they
are now simple proxies for. They have been marked as deprecated, and
will be removed in a future release.

• profile_get_row()
• profile_get_name()
• profile_is_global()

Fixes 0034824