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

compiler/testData/diagnostics/tests/functionLiterals/unusedLiteral.fir.kt

@@ -0,0 +1,12 @@
+fun unusedLiteral(){
+    { ->
+        val i = 1
+    }
+}
+
+
+fun unusedLiteralInDoWhile(){
+    do{ ->
+            val i = 1
+    } while(false)
+}