SamplingProfiler does not load on Alpine based linux image

从 AsyncProfiler.java 中的 AsyncProfiler.getInstance 和 loadNativeLibrary 开始，然后在基于 Alpine 的镜像中启用 profiling_inferred_spans_enabled 以复现该故障。确定 agent 如何选择 native library；当加载的是 MUSL library 而不是 libasyncProfiler-linux-x64，并且 sampling profiler 在没有 UnsatisfiedLinkError 的情况下启动时，即表示完成。

Describe the bug

Enabling the sampling profiler on an Alpine based linux image results in a UnsatisfiedLinkError because libasyncProfiler-linux-x64 is loaded instead of the MUSL version.

Steps to reproduce

1. Attach APM agent on Alpine based linux machine (in our case eclipse-temurin:17-alpine)
2. Enable profiling_inferred_spans_enabled

Results in:

java.lang.IllegalStateException: It is likely that /home/appuser/ is not an executable location. Consider setting the profiling_inferred_spans_lib_directory property to a directory on a partition that allows execution
	at co.elastic.apm.agent.profiler.asyncprofiler.AsyncProfiler.getInstance(AsyncProfiler.java:86) ~[elastic-apm-agent-acb9b5f90d88f71f7c4eae5b818f1082-e6256b9ad98d9992211305097d439d61.jar:1.39.0]
	at co.elastic.apm.agent.profiler.SamplingProfiler.profile(SamplingProfiler.java:395) ~[elastic-apm-agent-acb9b5f90d88f71f7c4eae5b818f1082-e6256b9ad98d9992211305097d439d61.jar:1.39.0]
	at co.elastic.apm.agent.profiler.SamplingProfiler.run(SamplingProfiler.java:376) [elastic-apm-agent-acb9b5f90d88f71f7c4eae5b818f1082-e6256b9ad98d9992211305097d439d61.jar:1.39.0]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
	at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) [?:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
	at co.elastic.apm.agent.util.ExecutorUtils$2.run(ExecutorUtils.java:99) [elastic-apm-agent-acb9b5f90d88f71f7c4eae5b818f1082-e6256b9ad98d9992211305097d439d61.jar:1.39.0]
	at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: java.lang.UnsatisfiedLinkError: /home/appuser/libasyncProfiler-linux-x64-acb9b5f90d88f71f7c4eae5b818f1082-c6d96bf140e0562f0ce2765a99ced1c2.so: Error loading shared library libstdc++.so.6: No such file or directory (needed by /home/appuser/libasyncProfiler-linux-x64-acb9b5f90d88f71f7c4eae5b818f1082-c6d96bf140e0562f0ce2765a99ced1c2.so)
	at jdk.internal.loader.NativeLibraries.load(Native Method) ~[?:?]
	at jdk.internal.loader.NativeLibraries$NativeLibraryImpl.open(NativeLibraries.java:388) ~[?:?]
	at jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:232) ~[?:?]
	at jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:174) ~[?:?]
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:2389) ~[?:?]
	at java.lang.Runtime.load0(Runtime.java:755) ~[?:?]
	at java.lang.System.load(System.java:1953) ~[?:?]
	at co.elastic.apm.agent.profiler.asyncprofiler.AsyncProfiler.loadNativeLibrary(AsyncProfiler.java:106) ~[elastic-apm-agent-acb9b5f90d88f71f7c4eae5b818f1082-e6256b9ad98d9992211305097d439d61.jar:1.39.0]
	at co.elastic.apm.agent.profiler.asyncprofiler.AsyncProfiler.getInstance(AsyncProfiler.java:84) ~[elastic-apm-agent-acb9b5f90d88f71f7c4eae5b818f1082-e6256b9ad98d9992211305097d439d61.jar:1.39.0]
	... 9 more

Note that we're running with ENV LD_PRELOAD=/lib/libgcompat.so.0:/usr/lib/libunwind.so.8 because of a Netty native issue, without that you might get another exception

Expected behavior

Load the MUSL library. Either by detecting Alpine environment somehow or by adding a configuration option to instruct to load MUSL library version.

Debug logs

2023-07-03 08:27:15,716 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - Starting Elastic APM 1.39.0 as ** on Java 17.0.7 Runtime version: 17.0.7+7 VM version: 17.0.7+7 (Eclipse Adoptium) Linux 5.10.176+
2023-07-03 08:27:15,718 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - environment: 'NL-DEV' (source: /configuration/elasticapm.properties)
2023-07-03 08:27:15,720 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - config_file: '/configuration/elasticapm.properties' (source: Environment Variables)
2023-07-03 08:27:15,721 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - plugins_dir: '/home/appuser/apm-plugins' (source: Environment Variables)
2023-07-03 08:27:15,721 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - activation_method: 'PROGRAMMATIC_SELF_ATTACH' (source: Attachment configuration)
2023-07-03 08:27:15,722 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - secret_token: 'XXXX' (source: /configuration/elasticapm.properties)
2023-07-03 08:27:15,723 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - server_urls: '**' (source: /configuration/elasticapm.properties)
2023-07-03 08:27:15,725 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - application_packages: 'io.h4h' (source: /configuration/elasticapm.properties)
2023-07-03 08:27:15,725 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - profiling_inferred_spans_enabled: 'true' (source: Attachment configuration)
2023-07-03 08:27:15,726 [Attach Listener] INFO  co.elastic.apm.agent.configuration.StartupInfo - profiling_inferred_spans_lib_directory: '/home/appuser/' (source: Attachment configuration)