[Fleet] bundled packages - use package storage v2 for synthetics (#14…

…6931)

## Summary

Relates to failures seen on
#146823

Synthetics package is just published into package storage v2, so it
requires to add an exception as it was done for the APM package.

src/dev/build/tasks/bundle_fleet_packages.ts

@@ -70,8 +70,12 @@ export const BundleFleetPackages: Task = {
         const archivePath = `${fleetPackage.name}-${versionToWrite}.zip`;
         let archiveUrl = `${eprUrl}/epr/${fleetPackage.name}/${fleetPackage.name}-${fleetPackage.version}.zip`;
 
-        // Point APM and Endpoint packages to package storage v2
-        if (fleetPackage.name === 'apm' || fleetPackage.name === 'endpoint') {
+        // Point APM, Endpoint and Synthetics packages to package storage v2
+        if (
+          fleetPackage.name === 'apm' ||
+          fleetPackage.name === 'endpoint' ||
+          fleetPackage.name === 'synthetics'
+        ) {
           archiveUrl = `${PACKAGE_STORAGE_V2_URL}/epr/${fleetPackage.name}/${fleetPackage.name}-${fleetPackage.version}.zip`;
         }