Should we optimize SmallRyeHealthReporter initialization a bit?

[gsmet]

It's less pressing since you made the JsonProvider static but given the SmallRyeHealthReporter bean is @ApplicationScoped, the no-arg constructor is called twice when it is initialized.

I was wondering if:

• we could make it @Singleton but we would need to check if doesn't break any use case - not sure how easy it would be
• move the initialization that is in the constructor to the already existing @Postconstuct.

The latter would probably be the less risky move.