FIR IDE: move analysis api fir testdata to the analysis directory

analysis/analysis-api/testData/symbols/symbolByPsi/outerAndInnerClasses.kt

@@ -0,0 +1,11 @@
+class X<T> {
+    inner class Y<T1>
+    class Z<T2>
+
+    fun <T3> foo() {
+        class U<T4> {
+            inner class K<T5>
+            class C<T6>
+        }
+    }
+}