ISTWCMS-6421: adding layout builder browser for waterloo events

config/install/layout_builder_browser.layout_builder_browser_block.uw_lbb_waterloo_events.yml

+uuid: 2061a09a-c71e-486a-a6df-faba2057d18d
+langcode: en
+status: true
+dependencies: {  }
+id: uw_lbb_waterloo_events
+block_id: uw_cbl_waterloo_events
+category: uw_bc_listings
+label: 'Waterloo events'
+image_path: images/layout_builder_browser/eventlist.svg
+image_path_base: 'theme:uw_fdsu_theme_resp'
+image_alt: 'Waterloo events'
+weight: 0