Initial Filters is not respected when array type filter

When the user supplies an array type filter with initialFilters, the initialFilters are never used. The filter logic has the following code:

	  const urlValue = isArrayFilter ? searchParams?.getAll(key) : searchParams?.get(key);

      // eslint-disable-next-line no-nested-ternary
      loadedFilters[key] = urlValue
        ? (isArrayFilter && !Array.isArray(urlValue) ? [ urlValue ] : urlValue)
        : initialFilters[key];

The issue is that searchParams.getAll returns an empty array when key doesn't exist, so the truthy check on urlValue evaluates to true even though nothing is set.

This can be resolved by checking the length of the array when isArrayFilter is true

Jira Issue: PF-4302

Start from the filter logic shown in the issue and trace how array filters and initialFilters are loaded when the URL key is absent. Reproduce the case with an array type filter and verify that the configured initial values are retained when no URL values exist.