Bluetooth: Mesh: Add support for Large Composition Data models

- Adds Large Composition Data Server and Client definitions
- Adds Client API definition
- Adds Health Server Metadata definition
- Refactors Composition Data processing (as a Server) to use common
 methods with Large Comp Data Server

Co-authored-by: Pavel Vasilyev <pavel.vasilyev@nordicsemi.no>
Co-authored-by: Stine Akredalen <stine.akredalen@nordicsemi.no>
Co-authored-by: Omkar Kulkarni <omkar.kulkarni@nordicsemi.no>
Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl>
Signed-off-by: Pavel Vasilyev <pavel.vasilyev@nordicsemi.no>