Update UserContactMethod Playwright Test to Include Editing

[tony-tvu]

What problem would you like to solve? Please describe:
The current playwright tests for the email user contact method do not include verification for editing a contact method. Ensuring consistency in these components is crucial as we migrate to using the new API-driven components for our custom plugins story.

Describe the solution you'd like:
To address this issue, we should add an assertion for editing a contact method in the existing email-cm.spec.ts file.

Describe alternatives you've considered:
N/A

Additional context:
We are currently working on enabling custom destination providers and creating new API-driven UI components. To ensure a smooth transition, we need tests to confirm that existing UI functionality remains unaffected when we integrate these new components.