Prior to this commit, SpEL incorrectly wrapped a primitive array in an
Object[] array when invoking Object[] varargs methods and constructors.
This commit addresses this by updating the convertArguments(...) method
in ReflectionHelper as follows when the user supplies the varargs
already packaged in a primitive array.
- When deciding whether to convert a single element passed as varargs,
we now check if the argument is an array that is assignable to the
varargs array type.
- When converting an array supplied as the varargs, we convert that
array to the varargs array type.
Closes gh-33317
8badae9d72