chore(ui5-dynamic-page): migrate wdio tests to cypress

[NakataCode]

Convert DynamicPage tests to Cypress component tests while maintaining test coverage and functionality parity with original specs.

JIRA: BGSOFUIPIRIN-6816

[yanaminkova]

Minor suggestion: I noticed that in several tests we set the headerPinned and headerSnapped properties dynamically using .invoke(). While this approach works fine, it might improve clarity and readability to define separate mount configurations where the prop is set upfront. This way, the component's initial state is explicit in the test setup.
That said, the current approach is valid and working well, so feel free to keep it as is if you prefer.

[NakataCode]

Thanks for the suggestion! You're right that setting properties upfront in JSX is cleaner.

After testing this approach, I discovered that the DynamicPage component has an initialization timing issue with headerSnapped={true} in JSX - it causes Cannot read properties of null (reading 'scrollTop') errors because the component tries to access scroll elements before they're ready.

So I use a hybrid approach:
Properties like headerPinned={true}, showFooter work fine in JSX and are set there
Only headerSnapped uses .invoke("prop") after mounting