[Test] Add a test covering missed error for virtual inline vals in enum classes

Addition to inline functions that are already present in tests.

^KT-34372

compiler/testData/diagnostics/tests/inline/virtualValInEnum.fir.kt

@@ -0,0 +1,15 @@
+enum class B2() {
+    A {
+        override val foo: String
+            get() = "foo1"
+
+        override val bar: String
+            get() = "bar1"
+    };
+
+    open val foo
+    <!DECLARATION_CANT_BE_INLINED!>inline<!> get() = "foo"
+
+    open <!DECLARATION_CANT_BE_INLINED!>inline<!> val bar
+        get() = "bar1"
+}

compiler/testData/diagnostics/tests/inline/virtualValInEnum.kt

@@ -0,0 +1,15 @@
+enum class B2() {
+    A {
+        override val foo: String
+            get() = "foo1"
+
+        override val bar: String
+            get() = "bar1"
+    };
+
+    open val foo
+    <!DECLARATION_CANT_BE_INLINED_WARNING!>inline<!> get() = "foo"
+
+    open <!DECLARATION_CANT_BE_INLINED_WARNING!>inline<!> val bar
+        get() = "bar1"
+}