[Fleet] Add ?full query param to deprecated package info API (#145012)

## Summary

The policy editor page still uses this deprecated API, so we need to add
the new `?full` query parameter to its schema as well

Fixes #144982

x-pack/plugins/fleet/server/types/rest_spec/epm.ts

@@ -57,6 +57,7 @@ export const GetInfoRequestSchemaDeprecated = {
   query: schema.object({
     ignoreUnverified: schema.maybe(schema.boolean()),
     prerelease: schema.maybe(schema.boolean()),
+    full: schema.maybe(schema.boolean()),
   }),
 };