Add initial support for @JvmRecord in backend

- Write relevant class files attributes
- Emit property accessors with records-convention: propertyName -> propertyName()

^KT-43677 In Progress

compiler/testData/codegen/java15/box/records/bytecodeShapeForJava.kt

@@ -0,0 +1,29 @@
+// !LANGUAGE: +JvmRecordSupport
+// JVM_TARGET: 15_PREVIEW
+// FILE: JavaClass.java
+public class JavaClass {
+    public static String box() {
+        MyRec m = new MyRec<String>("O", "K");
+        return m.x() + m.y();
+    }
+}
+// FILE: main.kt
+
+@JvmRecord
+class MyRec<R>(val x: String, val y: R)
+
+fun box(): String {
+    val recordComponents = MyRec::class.java.recordComponents
+    val x = recordComponents[0]
+    val y = recordComponents[1]
+
+    if (x.name != "x") return "fail 1: ${x.name}"
+    if (x.type != String::class.java) return "fail 2: ${x.type}"
+    if (x.genericSignature != null) return "fail 3: ${x.genericSignature}"
+
+    if (y.name != "y") return "fail 4: ${y.name}"
+    if (y.type != Any::class.java) return "fail 5: ${y.type}"
+    if (y.genericSignature != "TR;") return "fail 6: ${y.genericSignature}"
+
+    return JavaClass.box()
+}