docs(*) fix dangling links in API docs (#16632)

* docs(animations): fix links to `Component` animations

* docs(core): fix links to `ReflectiveInjector` methods

The `resolve` and other methods were moved from the
`Injector` to the `ReflectiveInjector`.

* docs(core): fix links to `Renderer`

The local links were assuming that that methods were on the
current document (e.g. `RootRenderer`), but they are actually
on the `Renderer` class.

* docs(router): fix links to methods

* docs(forms): fix links to methods

* docs(core): fix links to methods

* docs(router): fix API page links and an internal link

packages/upgrade/src/common/downgrade_component.ts

@@ -18,7 +18,7 @@ let downgradeCount = 0;
 /**
  * @whatItDoes
  *
- * *Part of the [upgrade/static](/docs/ts/latest/api/#!?query=upgrade%2Fstatic)
+ * *Part of the [upgrade/static](api?query=upgrade%2Fstatic)
  * library for hybrid upgrade apps that support AoT compilation*
  *
  * Allows an Angular component to be used from AngularJS.

packages/upgrade/src/common/downgrade_injectable.ts

@@ -12,7 +12,7 @@ import {INJECTOR_KEY} from './constants';
 /**
  * @whatItDoes
  *
- * *Part of the [upgrade/static](/docs/ts/latest/api/#!?query=upgrade%2Fstatic)
+ * *Part of the [upgrade/static](api?query=upgrade%2Fstatic)
  * library for hybrid upgrade apps that support AoT compilation*
  *
  * Allow an Angular service to be accessible from AngularJS.