[1.0.0-alpha2] Remove ui_patterns_overrides

Looks like a cleaning task, so a beta phase task

By the way, some of the logic expected in Drupal\ui_patterns_overrides\Plugin\UiPatterns\Source\ComponentSource is still in ComponentLibraryPanel.

Following 📌 [1.0.0-alpha2] Flatten the Fields list Active , the tasks described in the issue summary will change a bit.

Let's also fix that:

LocalActionsSource and LocalTasksSource are extending Drupal\ui_patterns\Plugin\UiPatterns\Source\BlockSource which is implemntign the SourceWithChoice interface.

And do this remaining task from 📌 Align source contexts Active :

Rename is_display_builder_page_layout context by page