Apply workaround for earlyExit

src/saveOnly.ts

@@ -1,15 +1,3 @@
-import * as core from "@actions/core";
+import { saveOnlyRun } from "./saveImpl";
 
-import saveImpl from "./saveImpl";
-import { NullStateProvider } from "./stateProvider";
-
-async function run(): Promise<void> {
-    const cacheId = await saveImpl(new NullStateProvider());
-    if (cacheId === -1) {
-        core.warning(`Cache save failed.`);
-    }
-}
-
-run();
-
-export default run;
+saveOnlyRun(true);