Update to ASM 9.4 to support Java 20

[kwin]

Only 9.4 added support for Java 20 (https://asm.ow2.io/versions.html). The embedded version is currently at 9.2 (https://github.com/eclipse/sisu.inject/tree/master/org.eclipse.sisu.inject/src/org/eclipse/sisu/space/asm) which only supports up to Java 18. At the same time it would be good to just depend on ASM instead of embedding it to allow consumers to override that dependency with a newer version without relying on a Sisu release.