Cannot start server with alternate JVM because of Flight recorder requirement

Hi,

It is not possible to run the 21w37a snapshot on an alternate JVM (OpenJ9) that does not have the Java Flight Recorder included, as there seems to be a hard dependency. This was not the case in previous 1.17 versions.

Steps to reproduce:
1) Install OpenJ9 JVM
2) Start the 21w37a snapshot
3) The server does not start

Exception:

Exception in thread "main" java.lang.NoClassDefFoundError: jdk.jfr.FlightRecorder
at dn.<init>(SourceFile:208)
at xn.<init>(SourceFile:39)
at xn.a(SourceFile:88)
at net.minecraft.server.Main.main(SourceFile:162)
Caused by: java.lang.ClassNotFoundException: jdk.jfr.FlightRecorder
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:822)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:182)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:1106)
... 4 more

No crash report is created.