fix: FIT-1412: In Interactive task source, Search returns no results when certain filters (All, Annotations, Predictions, Data) are applied

[yyassi-heartex]

This pull request adds comprehensive tests for the JsonViewer component's filtered search functionality and improves the search logic to provide more robust fallback matching. The main focus is to ensure that searching within the JSON viewer works as expected, even when custom filters are applied or when the default search logic does not match.

Testing improvements:

• Added a new test suite in json-viewer.test.tsx that verifies the search functionality of JsonViewer, including scenarios with custom filters and explicit filter selection.

Search logic enhancements:

• Introduced a fallbackNodeMatch function in json-viewer.tsx to provide additional matching logic when the default matchNode does not find a match. This function checks the node's key, path, and value for the search term.
• Updated the searchFilter logic in JsonViewer to use fallbackNodeMatch as a backup when matchNode returns false, improving the reliability of search results.