RFR: 8284942: Proxy building can just iterate superinterfaces once [v3]

[liach]

On Fri, 20 May 2022 00:10:01 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> liach has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:
>> 
>>  - Updates suggested by mandy
>>  - Merge branch 'master' into fix/proxy-single-pass
>>  - Don't need to complexify module cache
>>  - 8284942: Proxy building can just iterate superinterfaces once
>
> Looks good with a couple comments.

@mlchung Would you review again that I've updated per your suggestions? In addition, I've moved all proxy class context-related validation into the record compact constructor.

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PR: https://git.openjdk.java.net/jdk/pull/8281