[javasrc2cpg] Parse enums correctly when keepTypeArguments is enabled

[ricekot]

CPG generation for enum classes fails with the following error when keepTypeArguments is enabled. I couldn't get to the bottom of the issue but I've added a unit test in this PR to reproduce the error.

java.lang.RuntimeException: SOE getting binding table for Color
	at io.joern.javasrc2cpg.util.BindingTable$.createBindingTable$$anonfun$2(BindingTable.scala:68) ~[classes/:?]
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15) ~[scala3-library_3-3.5.2.jar:3.5.2]
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10) ~[scala3-library_3-3.5.2.jar:3.5.2]
	at scala.collection.immutable.List.foreach(List.scala:334) ~[scala-library-2.13.14.jar:?]
	at io.joern.javasrc2cpg.util.BindingTable$.createBindingTable(BindingTable.scala:62) ~[classes/:?]
	at io.joern.javasrc2cpg.astcreation.AstCreator.getMultiBindingTable$$anonfun$1(AstCreator.scala:328) ~[classes/:?]
	at scala.collection.mutable.HashMap.getOrElseUpdate(HashMap.scala:469) ~[scala-library-2.13.14.jar:?]
	at io.joern.javasrc2cpg.astcreation.AstCreator.getMultiBindingTable(AstCreator.scala:329) ~[classes/:?]
	at io.joern.javasrc2cpg.astcreation.AstCreator.getBindingTable(AstCreator.scala:334) ~[classes/:?]
...