FIR IDE: move low level api testdata sources to the analysis directory

analysis/low-level-api-fir/testdata/partialRawBuilder/memberFunction.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+// FUNCTION: foo
+
+package test.classes
+
+class Outer {
+    inner class Inner {
+        fun bar()
+
+        fun foo() {
+            val outer = Outer()
+            val inner = outer.Inner()
+            inner.bar()
+        }
+    }
+}