Split GenerateNotNullAssertionsTests into standard box and bytecode tests

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

@@ -0,0 +1,38 @@
+// IGNORE_BACKEND: JVM_IR
+// Missing IMPLICIT_NOTNULL casts
+// FILE: A.java
+import org.jetbrains.annotations.NotNull;
+
+class A<T, U> {
+    @NotNull
+    T foo() { return null; }
+}
+
+// FILE: B.java
+import org.jetbrains.annotations.NotNull;
+
+class B<T> extends A<T, Integer> {
+    @Override
+    @NotNull
+    T foo() { return null; }
+}
+
+// FILE: C.java
+import org.jetbrains.annotations.NotNull;
+
+class C extends B<String> {
+    @Override
+    @NotNull
+    String foo() { return null; }
+}
+
+// FILE: javaMultipleSubstitutions.kt
+internal fun bar(a: A<String, Int>, b: B<String>, c: C) {
+    val sa: String = a.foo()
+    val sb: String = b.foo()
+    val sc: String = c.foo()
+}
+
+// @JavaMultipleSubstitutionsKt.class
+// 3 checkExpressionValueIsNotNull
+// 3 checkParameterIsNotNull