[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/inlineClasses/inlineClassCanOnlyImplementInterfaces.fir.kt

@@ -0,0 +1,13 @@
+// !LANGUAGE: +InlineClasses
+
+abstract class AbstractBaseClass
+
+open class OpenBaseClass
+
+interface BaseInterface
+
+inline class TestExtendsAbstractClass(val x: Int) : AbstractBaseClass()
+
+inline class TestExtendsOpenClass(val x: Int) : OpenBaseClass()
+
+inline class TestImplementsInterface(val x: Int) : BaseInterface