docs(bootstrap-prettify): fix $timeout issues and update related docs

End 2 end tests wait for all `$timeout`s to be run before completing the test.
This was problematic where we were using timeouts that restarted themselves because
there would never be a point when all timeouts had completed, causing the tests to hang.

To fix this $timeout had been monkey-patched but this caused other issue itself.

Now that we have $interval we don't need to use $timeout handlers that re-trigger the $timeout
so we can ditch the monkey-patch.

This commit tidies up any examples that are using this approach and changes them to use $interval
instead.

Closes #5232

docs/components/angular-bootstrap/bootstrap-prettify.js

@@ -215,17 +215,7 @@ directive.ngEmbedApp = ['$templateCache', '$browser', '$rootScope', '$location',
           }];
           this.html5Mode = angular.noop;
         });
-        $provide.decorator('$timeout', ['$rootScope', '$delegate', function($rootScope, $delegate) {
-          return angular.extend(function(fn, delay) {
-            if (delay && delay > 50) {
-              return setTimeout(function() {
-                $rootScope.$apply(fn);
-              }, delay);
-            } else {
-              return $delegate.apply(this, arguments);
-            }
-          }, $delegate);
-        }]);
+
         $provide.decorator('$rootScope', ['$delegate', function($delegate) {
           embedRootScope = $delegate;