test: enable http cache for tests (#30278)

.github/workflows/ci-test-e2e.yml

apps/meteor/package.json

apps/meteor/playwright.config.ts

apps/meteor/playwright.prepare.mjs

apps/meteor/tests/e2e/channel-management.spec.ts

apps/meteor/tests/e2e/homepage.spec.ts

...meteor/tests/e2e/omnichannel/omnichannel-livechat.spec.ts

...ts/e2e/omnichannel/omnichannel-priorities-sidebar.spec.ts

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

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

apps/meteor/tests/e2e/page-objects/omnichannel-livechat.ts