RFR: 8345286: Remove use of SecurityManager API from misc areas

[Jaikiran Pai]

On Mon, 2 Dec 2024 12:13:57 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

> Can I please get a review of this change which removes usages of SecurityManager related APIs and some leftover related to SecurityManager changes?
> 
> This addresses https://bugs.openjdk.org/browse/JDK-8345286. Most of these changes are trivial. The `src/java.base/linux/classes/jdk/internal/platform/CgroupUtil.java` used to expose utility methods for dealing with SecurityManager permissions and it was called from a few places. That class is no longer needed with the clean up done in this PR.
> 
> No new tests have been introduced and tier testing is currently in progress.

Hello Severin  @jerboaa, given your work in the cgroups area of the JDK, could you help review the updates in this PR for those classes?

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PR Comment: https://git.openjdk.org/jdk/pull/22478#issuecomment-2511382273