Split GenerateNotNullAssertionsTests into standard box and bytecode tests

compiler/testData/codegen/bytecodeText/notNullAssertions/arrayListGet.kt

@@ -0,0 +1,14 @@
+// IGNORE_BACKEND: JVM_IR
+// Missing IMPLICIT_NOTNULL casts
+import java.util.ArrayList
+
+fun foo(): Any {
+    val a = ArrayList<String>()
+    return a.get(0)
+}
+
+fun bar(a: ArrayList<String>) {
+}
+
+// 1 checkExpressionValueIsNotNull
+// 1 checkParameterIsNotNull