RFR: 8366456: Allow AllocFailStrategy for RBTree [v2]

[Axel Boldt-Christmas]

On Mon, 1 Sep 2025 08:57:30 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

>> Right now the RBTree forces you to use the intrusive tree if you want fine-grained control of the out-of-memory strategy of the node allocations. We can change this to be a bit more flexible.
>> 
>> One of the tests were incorrectly indented, so I fixed that. I also changed from `typedef` to `using`, turns out that `typedef` can give strange errors when the template instantiation is incorrect[0].
>> 
>> [0] For my particular gcc
>
> Johan Sjölen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove

lgtm.

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Marked as reviewed by aboldtch (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27011#pullrequestreview-3172844423