Migrate GlFilteredSearch to use terms-as-tokens in app/assets/javascripts/vue_shared/issuable/list/components/issuable_list_root.vue

See the parent epic for the most up to date migration guidelines and details about the tasks below.

Tasks

• Enable the terms-as-tokens prop
• Set the translated search-text-option-label prop
• Check all existing tokens work (can be searched for, submitted)
• If necessary, remove unneeded quotes from existing option values/titles
• If necessary, remove unneeded dashes/non-space characters from tokens and option titles
• If necessary, reimplement any tokens which do not provide options or suggestions
• If necessary, write migrations for stored searches
• If necessary, fix any broken Jest specs
• If necessary, fix any broken feature specs
• If necessary, fix any broken QA specs