RFR: 8333749: Consolidate ConstantDesc conversion in java.base [v6]

[duke]

On Fri, 7 Jun 2024 13:56:24 GMT, Chen Liang <liach at openjdk.org> wrote:

>> In java.base, especially in bytecode generators, we have many different methods converting known valid Class and MethodType into ClassDesc and MethodTypeDesc. These conversions should be consolidated into the same utility method for the ease of future maintenance.
>
> Chen Liang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   ExE-Boss review, go through validated path in Class

@liach 
Your change (at version d3938b4b9f4837dd5697545638e184bd1984fe09) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk/pull/19585#issuecomment-2155631028