Kotlin: Move tests from test/kotlin to test-kotlin1

Matches test-kotlin2

java/ql/test-kotlin1/query-tests/ConfusingOverloading/ConfusingOverloading.qlref

@@ -0,0 +1 @@
+Violations of Best Practice/Naming Conventions/ConfusingOverloading.ql

java/ql/test-kotlin1/query-tests/ConfusingOverloading/Test.kt

@@ -0,0 +1,20 @@
+class C {
+    var p: Int
+        get() = 1
+        set(value) {}
+    fun fn() {
+        val prop = C::p
+        prop(this)
+    }
+}
+
+class A {
+    fun <T : Any> fn(value: T, i: Int = 1) {}
+    fun fn(value: String, i: Int = 1) {}
+}
+
+class Foo {
+    val str by lazy {
+        "someString"
+    }
+}