Issue #2091691 by tim.plunkett: Convert test non-form page callbacks to routes and controllers.

core/includes/menu.inc

core/lib/Drupal/Core/Controller/HtmlPageController.php

core/modules/block/custom_block/custom_block.module

.../tests/modules/custom_block_test/custom_block_test.module

...s/modules/custom_block_test/custom_block_test.routing.yml

...s/comment/lib/Drupal/comment/Tests/CommentNonNodeTest.php

...s/content_translation/content_translation.local_tasks.yml

...ntent_translation/Plugin/ContentTranslationLocalTasks.php

...lation/Plugin/Derivative/ContentTranslationLocalTasks.php

.../datetime/lib/Drupal/datetime/Tests/DatetimeFieldTest.php

core/modules/email/lib/Drupal/email/Tests/EmailFieldTest.php

core/modules/field/lib/Drupal/field/Tests/FormTest.php

...dules/field/lib/Drupal/field/Tests/TranslationWebTest.php

core/modules/forum/forum.module

core/modules/link/lib/Drupal/link/Tests/LinkFieldTest.php

core/modules/node/node.module

...odules/number/lib/Drupal/number/Tests/NumberFieldTest.php

...b/Drupal/options/Tests/OptionsSelectDynamicValuesTest.php

...s/options/lib/Drupal/options/Tests/OptionsWidgetsTest.php

.../system/lib/Drupal/system/Tests/Entity/EntityFormTest.php