ISTWCMS-6160: adding layout builder browser for publication reference teaser

config/install/layout_builder_browser.layout_builder_browser_block.uw_lbb_publication_teaser.yml

+langcode: en
+status: true
+dependencies: {  }
+id: uw_lbb_publication_teaser
+block_id: uw_cbl_publication_teaser
+category: uw_bc_teasers
+label: 'Publication reference teaser'
+image_path: images/layout_builder_browser/referenceteaser.svg
+image_path_base: 'theme:uw_fdsu_theme_resp'
+image_alt: 'Publication reference teaser'
+weight: null