[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolve/propertyFromJavaPlusAssign.kt

@@ -0,0 +1,22 @@
+/*
+ * Here we desugar b.text += "" into b.text = b.text + ""
+ *                                    ^1       ^2
+ * Problem is that += resolve expects that (2) will be resolved to
+ *   property symbol, but for java synthetics b.text resolves
+ *   to function `getText()`
+ */
+
+// FILE: B.java
+
+public class B {
+    public void setText(String text) {}
+    public String getText() {
+        return ""
+    }
+}
+
+// FILE: main.kt
+
+fun test(b: B) {
+    b.text += ""
+}