Predicate for field runtime hints should not have an explicit invoke option

[snicoll]

Looking at the changes for the new GraalVM format, FieldHintPredicate is no longer valid as it doesn't take field names into account. Also field hints always intended invocation (getting/setting the value of the field.

[bclozel]

Also, the TypeHint API is not aligned with the recent changes and still promotes reflection-only hints.