RFR: 8345656: Move os alignment functions out of ReservedSpace [v3]

[David Holmes]

On Mon, 9 Dec 2024 13:07:55 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> I have a wish to simplify the ReservedSpace classes (See: [JDK-8345655](https://bugs.openjdk.org/browse/JDK-8345655)) and as a small step I would like to move the small helper functions that align addresses and sizes to `os::vm_page_size()` and `os::vm_allocation_granularity()` out to be `os::` helpers.
>> 
>> Tested tier1-3 together with the other patches in the JDK-8345655 prototype.
>
> Stefan Karlsson has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove functions

Looks good. Thanks

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

Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/22600#pullrequestreview-2491269342