Convert issues page refactor to use GraphQL

...ts/javascripts/issuable_list/components/issuable_item.vue

...vascripts/issuable_list/components/issuable_list_root.vue

...vascripts/issues_list/components/issue_card_time_info.vue

...ts/javascripts/issues_list/components/issues_list_app.vue

app/assets/javascripts/issues_list/constants.js

app/assets/javascripts/issues_list/index.js

.../javascripts/issues_list/queries/get_issues.query.graphql

...vascripts/issues_list/queries/issue_info.fragment.graphql

app/assets/javascripts/issues_list/utils.js

...components/filtered_search_bar/tokens/iteration_token.vue

app/helpers/issues_helper.rb

.../javascripts/issues_list/queries/get_issues.query.graphql

...ntend/issues_list/components/issue_card_time_info_spec.js

spec/frontend/issues_list/components/issues_list_app_spec.js

spec/frontend/issues_list/mock_data.js

spec/frontend/issues_list/utils_spec.js

spec/helpers/issues_helper_spec.rb