[code-reflection] RFR: Add ConstructorRef [v2]

[Paul Sandoz]

On Mon, 14 Apr 2025 23:44:51 GMT, Mourad Abbay <mabbay at openjdk.org> wrote:

>> This is Maurizio's work.
>> This PR tries to make `NewOp` similar to how `InvokeOp` is designed. It does this by adding a descriptor for constructors: `ConstructorRef`.
>> `ConstructorRef` is wrapper around `FunctionType`, providing functionalities for resolution to a reflective instance.
>> Some changes are common between this PR and #393.
>
> Mourad Abbay has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove code that was deleted by a previous PR

src/jdk.incubator.code/share/classes/jdk/incubator/code/op/CoreOp.java line 3932:

> 3930:      * @return the instance creation operation
> 3931:      */
> 3932:     public static NewOp _new(boolean isVarargs, TypeElement returnType, ConstructorRef constructorDescriptor,

Update all the factory methods to accept `ConstructorRef` instead of `FunctionType`.

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PR Review Comment: https://git.openjdk.org/babylon/pull/395#discussion_r2045060683