Chore: improve some e2e selectors (#27936)

apps/meteor/tests/e2e/config/global-setup.ts

apps/meteor/tests/e2e/fixtures/inject-initial-data.ts

apps/meteor/tests/e2e/message-mentions.spec.ts

apps/meteor/tests/e2e/page-objects/fragments/home-content.ts

...tests/e2e/page-objects/fragments/home-flextab-channels.ts

apps/meteor/tests/e2e/page-objects/home-team.ts

apps/meteor/tests/e2e/page-objects/utils.ts

apps/meteor/tests/e2e/settings-account-profile.spec.ts