RFR: 8259216: javadoc omits method receiver for any nested type annotation [v2]

[liach]

> Fixes the bug where receiver type is omitted in generated Javadoc when the immediate receiver type is not annotated (but some other type within is).
> 
> In addition, fixed the bug where receiver type for constructor is not properly qualified (without a clickable link), i.e. `OuterClass.this` vs `this`.
> 
> Testing can is done with these two Java Files:
> `Ape.java`
> public class Ape<T> {
> 	public void m0(@Cute("m0") Ape<T>this) {}
> 	public void m1(@Cute("m1 outer")Ape<@Cute("m1 inner") T>this) {}
> 	public void m2(Ape<@Cute("m2") T>this) {}
> 	public void m3(Ape<T> this) {}
> 	public class Bee<Q, R> {
> 		public Bee(Ape<@Cute("parent ape's T") T> Ape.this) {}
>                 public Bee(@Cute("top level") Ape<T> Ape.this, Void varArg) {}
> 		public void f0(Ape<T>.Bee<Q, R> this) {}
> 		public void f1(Ape<T>.Bee<@Cute("Bee Q f1") Q, R> this) {}
> 		public void f2(Ape<T>. at Cute("Bee f2") Bee<Q, R> this) {}
> 		public void f3(Ape<@Cute("Ape T f3") T>.Bee<Q, R> this, Ape<@Cute("A regular param's ape T") Throwable>.Bee<Integer, Long> anotherParam) {}
> 	}
> }
> 
> `Cute.java`
> import java.lang.annotation.Documented;
> import java.lang.annotation.ElementType;
> import java.lang.annotation.Retention;
> import java.lang.annotation.RetentionPolicy;
> import java.lang.annotation.Target;
> 
> @Documented
> @Target(ElementType.TYPE_USE)
> @Retention(RetentionPolicy.RUNTIME)
> public @interface Cute {
> 	String value() default "";
> }
> 
> 
> Before the fix (tested in oracle jdk 15.0.1):
>  - javadoc misses receiver for `Ape#m2()` `Bee#<init>()` `Bee#f1()` `Bee#f3(Bee)` in the method details section 
>  - javadoc's receiver for `Bee#<init>(Void)` is unqualified; such unqualified receiver fails in `javac`
> After the fix:
>  - The 4 methods now have receivers in method details.
>    - `Ape#m3` `Bee#f0` still don't have receivers documented as their receivers are not annotated
>    - `Bee#f3(Bee)`'s receiver is not annotated due to a distinct bug
>  - javadoc's receiver for `Bee#<init>(Void)` is now qualified as `Bee.this` (without a link on `Bee`)
> 
> (Note: receiver parameters are never included in the method summary section; they only present in method details sections)
> 
> Non goal:
>  - Won't fix the bug that a nested type's parent's type parameters are not documented, such as in `Ape.Bee#f3` in this example

liach has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  8259216: javadoc omits method receiver for any nested type annotation

-------------

Changes: https://git.openjdk.java.net/jdk/pull/1997/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1997&range=01
  Stats: 73 lines in 2 files changed: 53 ins; 8 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1997.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1997/head:pull/1997

PR: https://git.openjdk.java.net/jdk/pull/1997