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

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

@@ -0,0 +1,15 @@
+// !LANGUAGE: +InlineClasses
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+inline class Foo(val x: Int)
+inline class Bar(val y: String)
+
+fun test(f1: Foo, f2: Foo, b1: Bar, fn1: Foo?, fn2: Foo?) {
+    val a1 = f1 === f2 || f1 !== f2
+    val a2 = f1 === f1
+    val a3 = f1 === b1 || f1 !== b1
+
+    val c1 = fn1 === fn2 || fn1 !== fn2
+    val c2 = f1 === fn1 || f1 !== fn1
+    val c3 = b1 === fn1 || b1 !== fn1
+}