Share CodeQL bundle platform definitions

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

src/setup-codeql.ts

@@ -17,6 +17,7 @@ import {
   isRunningLocalAction,
 } from "./actions-util";
 import * as api from "./api-client";
+import { getBundlePlatform } from "./bundle-platform";
 import * as defaults from "./defaults.json";
 import {
   addNoLanguageDiagnostic,
@@ -78,20 +79,6 @@ function getCodeQLBundleExtension(
   }
 }
 
-/** Returns the platform component of the CodeQL bundle name for the current platform. */
-export function getBundlePlatform(): string | undefined {
-  switch (process.platform) {
-    case "win32":
-      return "win64";
-    case "linux":
-      return process.arch === "arm64" ? "linux-arm64" : "linux64";
-    case "darwin":
-      return "osx64";
-    default:
-      return undefined;
-  }
-}
-
 /**
  * Returns the name of the CodeQL bundle asset to download.
  *