[frontend] Fix filters edition after NLQ search & check date filters validity (#9751)

[Archidoit]

Proposed changes

Fix filters edition after NLQ search (frontend)

• Be able to modify the filters after a NLQ search
• The entities list should be updated according to these filters changes

Check date filters values validity (backend)

• check filters values validity for date filters: values should be absolute date or relative dates in date math format
• backend tests
  --> This avoids NLQ first model crash with queries like : 'list the 10 most recent reports'