Fix the error message in Designer when all schemas are chosen for a page provider form

While the Platform team was working on NXP-31118, it appeared that it's too complex to manage the case where a CSV export has to return all schemas (because it would require to extract all schemas from the TypeService and the CSV file would have too many columns).

As a workaround, we want to display an ERROR in Designer when a user defines a search form for a page provider with schemas="*"

<nuxeo-slot-content name="TestAllSchemas" slot="DRAWER_PAGES">
  <template>
    <nuxeo-search-form provider="pp_testAllSchemas" schemas="*" search-name="pp_testallschemas" name="testallschemas"></nuxeo-search-form>
  </template> 

The 2 -bundle.html and -custom-bundle.html files need to be analyzed to find this pattern where the element "nuxeo-search-form" is used with schemas="*" and then display an error in the UI.