Provide a way to produce any type in a producer

Note: this is a follow up "adding generic producers to CDI 2.0?" thread on the list

It is common to rely on a subsystem (another IoC, a coercing system, ...) to produce values. Today a producer can't say "I produce anything in a safe" manner.

Idea would be for injection point aware producers with a qualifier to producer Object and match all types.

It needs another flag (can be in @Qualifier or another annotation it is not really important) to say "I produce safely any type".

I did a PoC on github: https://github.com/rmannibucau/generic-producer-cdi but think it can be a nice feature of CDI 2.0 since it would avoid users to have to dig into extensions for several simple cases (configuration, bridge to other IoC...)