TBD: add support for lazily clinit of enum classes used in annotations

[dougxc]

This PR modifies the implementation for annotation parsing and handling such that it can be used by the JVMCI annotation mechanism in a way that avoids triggering class initialization for enum classes used in an annotation. This is an important use case for Native Image where unnecessary class initialization must be avoid at build time.

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[liach]

I wonder if we must reuse the core reflection annotation parser - what's the context of this annotation parsing? Against live classes?

[dougxc]

I wonder if we must reuse the core reflection annotation parser - what's the context of this annotation parsing? Against live classes?

Please ignore this draft PR for now. I've put it up for some discussion with the Native Image team and it's not clear we want to go this way. I'll provide more detail if/when I take this PR out of draft.