git: openjdk/jdk-sandbox: parttimenerd_jfr_cpu_time_sampler3: Use enum for internal error codes

[duke]

Changeset: a17a6c60
Branch: parttimenerd_jfr_cpu_time_sampler3
Author:    Johannes Bechberger <johannes.bechberger at sap.com>
Date:      2024-07-15 14:58:13 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/a17a6c607aba6a53d4b5c01c67aca6de3cdf2ab8

Use enum for internal error codes

! src/hotspot/share/jfr/periodic/sampling/jfrCPUTimeThreadSampler.cpp
! src/hotspot/share/jfr/recorder/stacktrace/jfrAsyncStackTrace.hpp