[meta] Remove drupal_set_breadcrumb and LegacyBreadcrumbBuilder

We need to follow-up to the local task/action plugins change to potentially make the breadcrumb service aware of these plugins and add those paths to the end of the breadcrumb.

So maybe better to file per-module issue to fix breadcrumbs and local tasks same time?

there's only 13 left for drupal_set_breadcrumb()

:~/www/core8# git grep drupal_set_breadcrumb
core/includes/common.inc:function drupal_set_breadcrumb($breadcrumb = NULL) {
core/includes/menu.inc: * Additionally, breadcrumbs set by drupal_set_breadcrumb() will override any
core/modules/comment/comment.pages.inc:  drupal_set_breadcrumb(array(l(t('Home'), NULL), l($node->label(), 'node/' . $node->id())));
core/modules/menu_link/lib/Drupal/menu_link/MenuLinkFormController.php:      drupal_set_breadcrumb($breadcrumb);
core/modules/system/lib/Drupal/system/LegacyBreadcrumbBuilder.php: * drupal_set_breadcrumb() mechanic.
core/modules/system/lib/Drupal/system/LegacyBreadcrumbBuilder.php: * Remove this once drupal_set_breadcrumb() has been eliminated.
core/modules/system/lib/Drupal/system/LegacyBreadcrumbBuilder.php:    $breadcrumb = drupal_set_breadcrumb();
core/modules/system/system.api.php: * of setting a custom breadcrumb via drupal_set_breadcrumb().
core/modules/system/system.api.php: * @see drupal_set_breadcrumb()
core/modules/taxonomy/taxonomy.pages.inc:  drupal_set_breadcrumb($breadcrumb);
core/modules/views/lib/Drupal/views/ViewExecutable.php:   *   If true, use drupal_set_breadcrumb() to install the breadcrumb.
core/modules/views/lib/Drupal/views/ViewExecutable.php:        if ($base && $current_breadcrumbs = drupal_set_breadcrumb()) {
core/modules/views/lib/Drupal/views/ViewExecutable.php:        drupal_set_breadcrumb($breadcrumb);

See also #2070651: Introduce a path-based breadcrumb builder, remove the one that's based on {menu_links}.

Added links to child issues

Suppose better close this one because last issue marked as Critical #2061913: Remove drupal_set_breadcrumb and LegacyBreadcrumbBuilder in Views module