Handle fields introduced in 9.3.0 for policy tests

internal/testrunner/runners/policy/policy.go

@@ -170,6 +170,12 @@ var policyEntryFilters = []policyEntryFilter{
 			{name: "data_stream.elasticsearch", onlyIfEmpty: true},
 		}},
 	}},
+
+	// Fields present since 9.3.0.
+	{name: "inputs", elementsEntries: []policyEntryFilter{
+		{name: "meta.package.policy_template"},
+		{name: "meta.package.release"},
+	}},
 }
 
 var uniqueOtelComponentIDReplace = policyEntryReplace{
@@ -321,6 +327,9 @@ func cleanPolicyMap(policyMap common.MapStr, entries []policyEntryFilter) (commo
 	return policyMap, nil
 }
 
+// isEmpty checks if the value is empty. It is considered empty if it is the zero value,
+// or for values for length, if it is zero. Values in ignoreValues are not counted for
+// the total length when present in lists.
 func isEmpty(v any, ignoreValues []any) bool {
 	switch v := v.(type) {
 	case nil:

internal/testrunner/runners/policy/policy_test.go

@@ -146,6 +146,8 @@ inputs:
         package:
             name: sql_input
             version: 1.0.0
+            release: ga
+            policy_template: sql_input
       name: test-mysql-sql_input
       package_policy_id: b2775cd2-185c-11ef-bf70-b7bd5adaa788
       streams: