RFR: CODETOOLS-7903176: Move LJV inside JOL [v6]

[Aleksey Shipilev]

On Sat, 15 Oct 2022 05:42:12 GMT, Ivan Ponomarev <duke at openjdk.org> wrote:

>> This moves https://github.com/atp-mipt/ljv project inside JOL in order for LJV to get access to internal JOL's APIs.
>> 
>> See blogposts about LJV [in Russian](https://habr.com/ru/post/599045/) /  [in English](https://dzone.com/articles/what-can-we-learn-from-java-data-structures-visual).
>
> Ivan Ponomarev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   fix review comments

Looks good.

As stated earlier, I'd like to have @robilad's blessing for this large contribution (even though it is not required).

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Marked as reviewed by shade (Committer).

PR: https://git.openjdk.org/jol/pull/24