RFR: JDK-8222719: adjust libperfstat usage on AIX

[Goetz Lindenmaier]

On Wed, 17 Jan 2024 08:21:28 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> Currently we use libperfstat with dlopen/dladdr, see src/hotspot/os/aix/libperfstat_aix.hpp (+cpp) .
> For compatibility reason we have support for  different versions of this API.
> However the AIX 5.3 / 6.1  support is outdated now, AIX versions older than 7.X are not supported any more by the current OpenJDK . So remove support for those old API versions.

LGTM

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Marked as reviewed by goetz (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17460#pullrequestreview-1829926923