RFR: 8312132: Add tracking of multiple address spaces in NMT [v74]

[Johan Sjölen]

On Tue, 14 May 2024 15:51:50 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

>> Please also test the scoped find function with different sets (eg. empty set, 1 item set etc).
>
> I've added a fair amount of tests to this code now. I still need to add some more for iterators, at least the closest_leq. Most of the tests use `int` (so not `size_t`), I wrote the `find` tests using `float` instead.

OK, very basic closest_leq tests added. For verify_self, I've removed all calls in the treap-code itself and let a small hammering test run the verify_self code.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18289#discussion_r1600320789