RFR: 8288497: add support for JavaThread::is_oop_safe() [v3]

[Daniel D. Daugherty]

On Fri, 17 Jun 2022 19:18:19 GMT, Patricio Chilano Mateo <pchilanomate at openjdk.org> wrote:

>> Daniel D. Daugherty has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Rename cannot_access_oops_safely to is_oop_safe and invert the function's logic.
>
> Thanks Dan, looks good.

@pchilano - Thanks for the re-review!

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

PR: https://git.openjdk.org/jdk19/pull/20