Inline: Fix operand stack type verify error

This is a proposal to fix KT-49364.
Operand stack type verification happens before `checkcast`
is executed. When we implicitly cast an inline class
to a non-inline type, if type of stack value is not subtype
of the target, then coercing is necessary.

compiler/ir/backend.jvm/codegen/src/org/jetbrains/kotlin/backend/jvm/codegen/PromisedValue.kt

@@ -38,6 +38,13 @@ abstract class PromisedValue(val codegen: ExpressionCodegen, val type: Type, val
         if (isFromTypeUnboxed && !isToTypeUnboxed) {
             val boxed = typeMapper.mapType(erasedSourceType, TypeMappingMode.CLASS_DECLARATION)
             StackValue.boxInlineClass(type, boxed, erasedSourceType.isNullable(), mv)
+
+            if (typeMapper.mapType(erasedTargetType) == target) {
+                if (!erasedSourceType.isSubtypeOf(erasedTargetType, codegen.context.typeSystem)) {
+                    StackValue.coerce(boxed, target, mv, false)
+                }
+            }
+
             return
         }
         if (!isFromTypeUnboxed && isToTypeUnboxed) {