[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolve/properties/noBackingFieldForExtension.kt

@@ -0,0 +1,11 @@
+interface B {
+    fun foo(): Int
+}
+
+class A {
+    val String.x: Int get() {
+        return field.foo()
+    }
+
+    val String.field: B get() = TODO()
+}