[FIR-TEST] Move analysis tests to separate module

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

@@ -0,0 +1,13 @@
+class Foo(vararg val strings: String)
+
+fun test_1(foo: Foo) {
+    for (s in foo.strings) {
+        s.length
+    }
+}
+
+fun test_2(vararg strings: String) {
+    for (s in strings) {
+        s.length
+    }
+}