fix(gatsby): don't log FAST_DEV message for each worker (#32961) (#32967)

* fix(gatsby): don't log FAST_DEV message for each worker (#32961)

(cherry picked from commit e547dc3)

* trigger ci

Co-authored-by: Michal Piechowiak <misiek.piechowiak@gmail.com>
Co-authored-by: Vladimir Razuvaev <vladimir.razuvaev@gmail.com>

Author: 3 people

packages/gatsby/src/services/initialize.ts

@@ -35,7 +35,10 @@ interface IPluginResolutionSSR extends IPluginResolution {
 if (
   process.env.gatsby_executing_command === `develop` &&
   process.env.GATSBY_EXPERIMENTAL_FAST_DEV &&
-  !isCI()
+  !isCI() &&
+  // skip FAST_DEV handling in workers, all env vars will be handle
+  // by main process already and passed to  worker
+  !process.env.GATSBY_WORKER_POOL_WORKER
 ) {
   process.env.GATSBY_EXPERIMENTAL_DEV_SSR = `true`
   process.env.PRESERVE_FILE_DOWNLOAD_CACHE = `true`