[SIEM][Detection Engine] - Update DE to work with new exceptions schema (#69715)

* Updates list entry schema, exposes exception list client, updates tests

* create new de list schema and unit tests

* updated route unit tests and types to match new list schema

* updated existing DE exceptions code so it should now work as is with updated schema

* test and types cleanup

* cleanup

* update unit test

* updates per feedback

x-pack/plugins/lists/README.md

@@ -157,12 +157,14 @@ And you can attach exception list items like so:
     {
       "field": "actingProcess.file.signer",
       "operator": "included",
-      "match": "Elastic, N.V."
+      "type": "match",
+      "value": "Elastic, N.V."
     },
     {
       "field": "event.category",
       "operator": "included",
-      "match_any": [
+      "type": "match_any",
+      "value": [
         "process",
         "malware"
       ]