[HttpKernel] Add #[ValueResolver] for specifying a controller argument resolver

Author: Mathieu

controller/value_resolver.rst

@@ -146,6 +146,17 @@ Symfony ships with the following value resolvers in the
     argument list. When the action is called, the last (variadic) argument will
     contain all the values of this array.
 
+:class:`Symfony\\Component\\HttpKernel\\Controller\\ArgumentResolver\\SpecifiedResolverValueResolver`
+    This resolver will ensure every argument bearing the ``ValueResolver`` attribute
+    will have its value provided by the resolver whose name is passed to the attribute.
+
+    This way, you don't have to worry about resolvers' priority and you speed up your
+    application a little because only one is called.
+
+    .. versionadded:: 6.3
+
+        The ``SpecifiedResolverValueResolver`` was introduced in Symfony 6.3.
+
 In addition, some components, bridges and official bundles provide other value resolvers:
 
 :class:`Symfony\\Component\\Security\\Http\\Controller\\UserValueResolver`