ISTWCMS-4472: add link for banners to layout builder browser

config/install/layout_builder_browser.layout_builder_browser_block.uw_cbl_banner_images.yml

+langcode: en
+status: true
+dependencies: {  }
+id: uw_cbl_banner_images
+block_id: 'inline_block:uw_cbl_banner_images'
+category: uw_bc_content
+label: 'Banner images'
+weight: 0
+image_path: images/layout_builder_browser/bannerimage.svg
+image_path_base: 'theme:uw_fdsu_theme_resp'
+image_alt: ''