Merge pull request #3044 from zarinn3pal/fix/psm-interop-node

fix: Fixed missing package with xds-v3-interop

Author: murgatroid99

packages/grpc-js-xds/scripts/xds.sh

@@ -50,6 +50,7 @@ cd $base/../grpc-reflection
 npm install
 
 # grpc-js-xds has a dev dependency on "../grpc-js", so it should pull that in automatically
+cd $base
 npm install
 
 cd ../../..