fix(beinleumi): support both new and old UI

[erikash]

This pull request includes several updates to the src/scrapers/base-beinleumi-group.ts file to enhance compatibility with both the new and old user interfaces of the banking website. The changes focus on updating the selectors and improving the resilience of iframe handling.

Key updates include:

UI Compatibility Enhancements:

• Updated getPossibleLoginResults function to recognize patterns from both the new and old UI.
• Enhanced waitForPostLogin function to wait for elements specific to both UI versions.

Iframe Handling Improvements:

• Introduced a retry mechanism in getTransactionsFrame to handle cases where the iframe might not be immediately available.
• Defined a constant IFRAME_NAME for the iframe name to avoid hardcoding it multiple times.

Account Data Fetching:

• Modified the logic in fetchAccounts to handle both single and multiple account scenarios more robustly, and to use the appropriate page or iframe based on availability.

[Nic3Guy]

@erikash please don't merge this yet, I test it (I'm on the new UI) and currently it fails, I will try to adjust.

P.s. sorry for missing that some people still have the old UI, I didn't think about that