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

compiler/testData/diagnostics/tests/resolve/specialConstructions/inferenceForElvis.fir.kt

@@ -0,0 +1,8 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
+// !CHECK_TYPE
+
+fun <T: Any> foo(f: (T) -> Unit): T? = null // T is used only as return type
+fun test() {
+    val x = foo { it checkType { <!INAPPLICABLE_CANDIDATE!>_<!><String>() }} ?: "" // foo() is inferred as foo<String>, which isn't very good
+    val y: Any = foo { it checkType { _<Any>() } } ?: "" // but for now it's fixed by specifying expected type
+}