feat: Add advanced contact filters (#3471)

Co-authored-by: Tejaswini <tejaswini@chatwoot.com>
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

lib/filters/filter_keys.json

@@ -100,7 +100,7 @@
       "filter_operators":  [ "equal_to", "not_equal_to", "contains", "does_not_contain" ],
       "attribute_type": "standard"
     },
-    "contact_identifier": {
+    "identifier": {
       "attribute_name": "Contact Identifier",
       "input_type": "search_box with name tags/plain text",
       "data_type": "text",