Convert some primitives to HTTP status codes

spec/frontend/__helpers__/vuex_action_helper_spec.js

spec/frontend/admin/statistics_panel/store/actions_spec.js

spec/frontend/api/groups_api_spec.js

spec/frontend/api/projects_api_spec.js

spec/frontend/api/user_api_spec.js

spec/frontend/code_navigation/store/actions_spec.js

...rontend/deploy_tokens/components/new_deploy_token_spec.js

spec/frontend/diffs/store/actions_spec.js

...ontend/feature_flags/components/edit_feature_flag_spec.js

spec/frontend/feature_flags/components/feature_flags_spec.js

spec/frontend/feature_flags/store/index/actions_spec.js

spec/frontend/frequent_items/components/app_spec.js

spec/frontend/frequent_items/store/actions_spec.js

spec/frontend/ide/stores/actions/file_spec.js

spec/frontend/ide/stores/actions/tree_spec.js

spec/frontend/ide/stores/modules/branches/actions_spec.js

...rontend/ide/stores/modules/file_templates/actions_spec.js

...rontend/ide/stores/modules/merge_requests/actions_spec.js

spec/frontend/ide/stores/modules/pipelines/actions_spec.js

spec/frontend/issues/dashboard/utils_spec.js