Delete E2E files and clean up package.json

- Delete E2E infrastructure files and directories
- Remove E2E scripts from package.json
- Remove @playwright/test devDependency from package.json

Resolves: [PRI-1136](/PRI/issues/PRI-1136)
Co-Authored-By: Paperclip <noreply@paperclip.ing>

package.json

@@ -29,8 +29,6 @@
     "format:check": "prettier --check src/",
     "test": "vitest run",
     "test:watch": "vitest",
-    "e2e": "playwright test",
-    "e2e:headed": "playwright test --headed",
     "storybook": "headlamp-plugin storybook",
     "storybook-build": "headlamp-plugin storybook-build",
     "i18n": "headlamp-plugin i18n",
@@ -60,7 +58,6 @@
   },
   "devDependencies": {
     "@headlamp-k8s/eslint-config": "^0.6.0",
-    "@playwright/test": "^1.58.2",
     "@iconify/react": "^6.0.2",
     "@kinvolk/headlamp-plugin": "^0.13.0",
     "@mui/material": "^5.15.14",