RFR: 8334223: Make Arena MEMFLAGs immutable [v3]

[Thomas Stuefe]

On Sat, 22 Jun 2024 16:42:21 GMT, Afshin Zafari <azafari at openjdk.org> wrote:

> Thanks, I could only found some missing Copyright updates:
> 
> * `compilerThread.cpp`
> * `resourceArea.cpp` and its `hpp`
> * `jni.cpp`, maybe for RedHat also?
> * `handles.hpp`
> * `thread.hpp`

Many thanks, @afshin-zafari. Fixed copyrights.

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PR Comment: https://git.openjdk.org/jdk/pull/19693#issuecomment-2184619420