[TEST] Migrate AbstractDiagnosticsWithExplicitApi to new test runners

compiler/testData/diagnostics/tests/testsWithExplicitApi/classes.fir.kt

@@ -0,0 +1,47 @@
+// SKIP_TXT
+
+/**
+ * KDoc for Foo1
+ */
+class Foo1() {}
+
+public class Foo2() {
+    /**
+     * KDoc for method
+     */
+    fun method() {}
+
+    /**
+     * KDoc for method2
+     */
+    public fun method2() {}
+    private fun method3() {}
+
+    fun implicit() = 10
+    public fun implicit2() = 10
+    public fun implicit3(): Int = 10
+}
+
+public open class ClassWithOpen() {
+    /**
+     * KDoc for method
+     */
+    fun method() {}
+
+    /**
+     * KDoc for openMethod
+     */
+    open fun openMethod() {}
+}
+
+public data class FooData(val i: Int, val s: String)
+
+data class FooData2(val i: Int, val s: String)
+
+public class WithNested {
+    class Nested {}
+    inner class Inner {}
+}
+
+enum class Foo { A, B }
+public enum class Bar { A, B }