Migrate asana connection UI metadata to YAML

[yjaw]

---

Migrate asana connection UI metadata to provider.yaml
This is test result: asana ui: True conn-fields: ['workspace', 'project']
related: #62345

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

• Yes (please specify the tool below)

Generated-by: [Antigravity] following the guidelines

---

• 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 or {issue_number}.significant.rst, in airflow-core/newsfragments.