Fix e2e flaky in AssetDetailPage and ConnectionsPage tests

[choo121600]

Summary

Re-enables two e2e tests that were previously marked as test.fixme in #65487 by stabilizing them using Playwright-native synchronization. No UI changes.

Problem

In CI (Linux WebKit), Ark UI dialog/popover occasionally leaves residual state longer than expected, which can block subsequent clicks.
This is due to lingering UI artifacts (e.g. backdrop pointer-events, stat-card layout) exceeding the default 10s action timeout.

The issue is specific to the resource-constrained CI runner (2 parallel workers) and is not reproducible on macOS Safari.

Changes

• ConnectionsPage
  • Replaced UI-based completion checks (URL change, toast, dialog closed) with waitForResponse on /api/v2/connections
  • Increased delete button click timeout to 30s to handle CI slowness.
• AssetDetailPage
  • Added waitForResponse for the asset detail API to ensure all data is loaded before proceeding.
  • Added toBeEnabled() pre-check
  • Replaced with standard click() for proper actionability

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

---

• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.

[choo121600]

This doesn’t seem to be fully working yet. I’ll check further.

[choo121600]

Thanks :)

[boring-cyborg]

Awesome work, congrats on your first merged pull request! You are invited to check our Issue Tracker for additional contributions.