[feature] add "form_id" in "form_answer" search option

[ladenree76000]

Looking for all form_answers submited from a form can be achieved by requesting form name.
name in text format and search doesn't work when names contains spaces or special chars or if too long.

So it would be usefull to add form id in form_anwers_seach options

class PluginFormcreatorForm_Answer

public function rawSearchOptions()

//add this option :
$tab[] = [
'id' => '9',
'table' => 'glpi_plugin_formcreator_forms',
'field' => 'id',
'name' => __('ID'),
'searchtype' => 'contains',
'datatype' => 'integer',
'massiveaction' => false
];