Set checkPresence in diff-range data extension

This commit updates the diff-range data extension to use the new
checkPresence field being introduced in CodeQL CLI 2.21.0, so that
diff-informed analysis no longer fails when a query pack does not have
the restrictAlertsTo extensible predicate.

src/analyze.ts

@@ -517,6 +517,7 @@ extensions:
   - addsTo:
       pack: codeql/util
       extensible: restrictAlertsTo
+      checkPresence: false
     data:
 `;
 

src/feature-flags.ts

@@ -112,8 +112,7 @@ export const featureConfig: Record<
   [Feature.DiffInformedQueries]: {
     defaultValue: false,
     envVar: "CODEQL_ACTION_DIFF_INFORMED_QUERIES",
-    minimumVersion: undefined,
-    toolsFeature: ToolsFeature.DatabaseInterpretResultsSupportsSarifRunProperty,
+    minimumVersion: "2.21.0",
   },
   [Feature.DisableCsharpBuildless]: {
     defaultValue: false,