Playwright docker improvements (#33213)

* Clean up playwright-common Dockerfile

* Speed up element-web docker build

* Wire up element-desktop playwright tests via nx

* Better debug logs for Element Desktop playwright in CI

* Iterate

* Iterate

* Fix element-desktop screenshot docker

* @electron/fuses

* Partial revert

apps/web/Dockerfile.dockerignore

@@ -23,6 +23,8 @@ apps/web/webpack-stats.json
 apps/web/playwright/
 apps/web/webapp/
 apps/web/debian/
+apps/desktop
+!apps/desktop/package.json
 
 packages/shared-components/__vis__/
 packages/shared-components/storybook-static/