RFR: 8348240: Remove SystemDictionaryShared::lookup_super_for_unregistered_class()

[Ioi Lam]

I reimplemented `SystemDictionaryShared::lookup_super_for_unregistered_class()` with Java code. This removes hacks in `SystemDictionary::resolve_with_circularity_detection()` to facilitate future clean-ups there that are planned by @coleenp. Please see the [JBS issue](https://bugs.openjdk.org/browse/JDK-8348240) for a discussion of why the hack was there.

The new Java code is in the `jdk/internal/misc/CDS$UnregisteredClassLoader` class. I also simplified `UnregisteredClasses::create_classloader()` by moving some unwieldy C++ `JavaCalls` code into Java.

### How this works:

For example, let's assume you have the following classfiles in foo.jar:


interface MyInterface1 {}
interface MyInterface2 {}
class MyClass extends Object implements MyInterface1, MyInterface2 {}


The CDS classlist file can look like this:


java/lang/Object id: 1
MyInterface1: id: 2 super: 1 source: foo.jar
MyInterface2: id: 3 super: 1 source: foo.jar
MyClass: id: 4 super: 1 interfaces: 2 3 source: foo.jar


When CDS handles the `MyClass: id: 4` line, it calls `CDS$UnregisteredClassLoader::load()` with the following parameters:

- `name` = "MyClass"
- `superClass` = java.lang.Object
- `interfaces` = {MyInterface1, MyInterface2} 

`CDS$UnregisteredClassLoader::load()` will start parsing MyClass.class from foo.jar. The ClassFileParser will see symbolic references to the supertypes of `MyClass`. These supertypes will be resolved by `CDS$UnregisteredClassLoader::findClass()`, using the classes provided by `superClass` and `interfaces`.

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Commit messages:
 - 8348240: Remove SystemDictionaryShared::lookup_super_for_unregistered_class()

Changes: https://git.openjdk.org/jdk/pull/23226/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23226&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8348240
  Stats: 342 lines in 9 files changed: 193 ins; 113 del; 36 mod
  Patch: https://git.openjdk.org/jdk/pull/23226.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23226/head:pull/23226

PR: https://git.openjdk.org/jdk/pull/23226