Added test for KT-6454 Obsolete class-files for lambdas aren't removed from output when 'inline' annotation is added to function.

The bug is reproducible only for non-incremental compilation mode, which
will be deprecated soon.

 #KT-6454 can't reproduce

jps-plugin/testData/incremental/pureKotlin/functionBecameInline/usage.kt

@@ -0,0 +1,5 @@
+class X {
+    fun main() {
+        Y().foo {}
+    }
+}