FindJNI: Support finding libjvm.so for all OpenJDK variants

Formerly only the "client" and "server" variant directories are being
checked for libjvm.so, but according to a 2021 OpenJDK upstream change
present in OpenJDK >= 18, there can be "minimal" and "zero" variants as
well. In particular, formerly (OpenJDK <= 17) the Zero variant had its
libjvm.so in "server/", but "zero/" in newer versions, which regressed
downstream CMake project builds running on systems with OpenJDK Zero VM.

Fix it by checking all 4 variant directories for libjvm.so.

Link: https://bugs.openjdk.org/browse/JDK-8273494
Link: https://github.com/openjdk/jdk/pull/5440
Link: 8fbcc8239a
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1078446

Modules/FindJNI.cmake

@@ -343,7 +343,9 @@ foreach(dir IN LISTS JAVA_AWT_LIBRARY_DIRECTORIES)
   list(APPEND JAVA_JVM_LIBRARY_DIRECTORIES
     "${dir}"
     "${dir}/client"
+    "${dir}/minimal"
     "${dir}/server"
+    "${dir}/zero"
     # IBM SDK, Java Technology Edition, specific paths
     "${dir}/j9vm"
     "${dir}/default"