ci(docs-infra): reduce verbosity of `yarn build` on CI (#26746)

PR Close #26746

aio/scripts/build-artifacts.sh

@@ -13,7 +13,7 @@ readonly deployedUrl=https://pr${prNumber}-${prLastSha:0:7}.ngbuilds.io/
   cd $PROJECT_ROOT/aio
 
   # Build and store the app
-  yarn build
+  yarn build --progress=false
 
   # Set deployedUrl as parameter in the opensearch description
   # deployedUrl must end with /

aio/scripts/deploy-to-firebase.sh

@@ -93,7 +93,7 @@ fi
   cd "`dirname $0`/.."
 
   # Build the app
-  yarn build-for $deployEnv
+  yarn build-for $deployEnv --progress=false
 
   # Include any mode-specific files
   cp -rf src/extra-files/$deployEnv/. dist/