Issue #3292520 - Handle block_build and block_view alter hooks
requested to merge issue/drupal-3292520:3292520-handle-block_build-and-block_view-alter-hooks into 11.x
Provides more hook_TYPE_alter() implementations.
List of hooks:
- hook_block_build_alter
- hook_block_build_BASE_BLOCK_ID_alter
- hook_block_view_alter
- hook_block_view_BASE_BLOCK_ID_alter
'Block field' ModuleHandlerInterface implementation was used as a reference
(see Drupal\block_field\Plugin\Field\FieldFormatter\BlockFieldFormatter::viewElements)
Closes #3292520