build: temporarily force local spawn strategy during release builds (#29021)

Temporarily force the local spawn strategy for building during release due to seeing unexpected and
yet to be traced failures in the Sass compiler within workers.

(cherry picked from commit 25eabeb)

Author: josephperrott

scripts/build-packages-dist.mts

@@ -64,7 +64,8 @@ function buildReleasePackages(distPath: string, isSnapshotBuild: boolean): Built
   // version placeholder is populated in the release output.
   const stampConfigArg = `--config=${isSnapshotBuild ? 'snapshot-build' : 'release'}`;
 
-  exec(`${bazelCmd} build ${stampConfigArg} ${targets.join(' ')}`);
+  // TODO(josephperrott): Figure out why we can't use workers right now.
+  exec(`${bazelCmd} build --spawn_strategy=local ${stampConfigArg} ${targets.join(' ')}`);
 
   // Delete the distribution directory so that the output is guaranteed to be clean. Re-create
   // the empty directory so that we can copy the release packages into it later.