Method node builder issue with instanceOf 

Issue cause [here](https://github.com/UnitTestBot/jacodb/blob/d65d8971c38ecb462cc4833e4cc8b47e998e3672/jacodb-core/src/main/kotlin/org/jacodb/impl/cfg/MethodNodeBuilder.kt#L542C85-L542C85)

this line should be:
`currentInsnList.add(TypeInsnNode(Opcodes.INSTANCEOF, expr.targetType.internalDesc))`