Merge branch '22-remove-blocks' into '8.x-1.x'

Issue #22: Remove facets block and move block visibility group

Closes #22

See merge request !27

config/optional/block.block.blog_topics_facet.yml

-uuid: 392eb691-4753-4737-af52-c4d417d12522
-langcode: en
-status: true
-dependencies:
-  config:
-    - block_visibility_groups.block_visibility_group.blog_listing
-    - facets.facet.blog_topics
-  module:
-    - block_visibility_groups
-    - facets
-  theme:
-    - octavia
-id: blog_topics_facet
-theme: octavia
-region: sidebar_first
-weight: 0
-provider: null
-plugin: 'facet_block:blog_topics'
-settings:
-  id: 'facet_block:blog_topics'
-  label: Topics
-  provider: facets
-  label_display: visible
-visibility:
-  condition_group:
-    id: condition_group
-    negate: false
-    block_visibility_group: blog_listing
-    context_mapping: {  }