Fix cross-references in Clang attribute reference (llvm#142967)

Anchors are automatically generated, but adding another anchor with the
same name hides the anchor that we actually want. Simply removing the
unnecessary self-referential anchor `lifetimebound` fixes the links.

The documentation for coro_disable_lifetimebound and coro_lifetimebound
also had an unnecessary redirection. It's possible to change the link
text to differ from the heading, but I think that's not necessary here.

Also fix a reference in clang-tidy that was using the (unstable)
numbered anchor.

Author: aaronpuchert

clang-tools-extra/docs/clang-tidy/checks/bugprone/return-const-ref-from-parameter.rst

@@ -42,7 +42,7 @@ on the control flow of the function, an overload where all problematic
 
 This issue can also be resolved by adding ``[[clang::lifetimebound]]``. Clang
 enable ``-Wdangling`` warning by default which can detect mis-uses of the
-annotated function. See `lifetimebound attribute <https://clang.llvm.org/docs/AttributeReference.html#id11>`_
+annotated function. See `lifetimebound attribute <https://clang.llvm.org/docs/AttributeReference.html#lifetimebound>`_
 for details.
 
 .. code-block:: c++

clang/include/clang/Basic/AttrDocs.td

@@ -4396,8 +4396,6 @@ annotated parameter.
       addToSet(str, s); // Not detected.
     }
   }
-
-.. _`lifetimebound`: https://clang.llvm.org/docs/AttributeReference.html#lifetimebound
   }];
 }
 
@@ -9042,14 +9040,14 @@ def CoroLifetimeBoundDoc : Documentation {
   let Category = DocCatDecl;
   let Content = [{
 The ``[[clang::coro_lifetimebound]]`` is a class attribute which can be applied
-to a coroutine return type (`CRT`_) (i.e.
+to a coroutine return type (`coro_return_type, coro_wrapper`_) (i.e.
 it should also be annotated with ``[[clang::coro_return_type]]``).
 
 All parameters of a function are considered to be lifetime bound if the function returns a
 coroutine return type (CRT) annotated with ``[[clang::coro_lifetimebound]]``.
 This lifetime bound analysis can be disabled for a coroutine wrapper or a coroutine by annotating the function
 with ``[[clang::coro_disable_lifetimebound]]`` function attribute .
-See `documentation`_ of ``[[clang::lifetimebound]]`` for details about lifetime bound analysis.
+See documentation of `lifetimebound`_ for details about lifetime bound analysis.
 
 
 Reference parameters of a coroutine are susceptible to capturing references to temporaries or local variables.
@@ -9109,9 +9107,6 @@ but do not pass them to the underlying coroutine or pass them by value.
   void use() {
     auto task = coro_wrapper(1); // use of temporary is fine as the argument is not lifetime bound.
   }
-
-.. _`documentation`: https://clang.llvm.org/docs/AttributeReference.html#lifetimebound
-.. _`CRT`: https://clang.llvm.org/docs/AttributeReference.html#coro-return-type
 }];
 }