[code-reflection] RFR: BytecodeLift directly calculating local variables + related BytecodeGenerator fixes [v4]

[Adam Sotona]

On Mon, 26 Aug 2024 15:46:11 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

>> I did this purely for debugging purposes. It is hard to differentiate if a variable has J_L_OBJECT type intentionally or as a result of a bug in the merge process of the lift.
>> I can revert it if needed.
>
> It would be odd for that unbounded wildcard type to appear in the model e.g., for `Object o = null`, can it? I recommend hiding it behind a debug system property

I think I can remove it now, nulls should be no more an issue.

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PR Review Comment: https://git.openjdk.org/babylon/pull/218#discussion_r1731448498