RFR: 8366457: Add ResourceArea and Arena allocators for the RBTree [v2]

[Johan Sjölen]

On Tue, 13 Jan 2026 12:57:49 GMT, Casper Norrbin <cnorrbin at openjdk.org> wrote:

>> We need `allocation.hpp` as that provides AllocFailStrategy, etc. `thread.hpp` isn't needed, that was unfortunate left overs from my first draft.
>
> Ah ok! Interesting that it worked before as `RBTreeCHeap` also uses `AllocFailStrategy`.

Yeah, thanks C for the copy-and-paste inclusion strategy :-).

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/29082#discussion_r2804795147