Make it possible to build custom plugin registry for s390x (#1146)

* install vsce@2.24.0 as a dep of ovsx

Signed-off-by: Valeriy Svydenko <vsvydenk@redhat.com>

dependencies/che-plugin-registry/build/dockerfiles/ovsx-installer.Dockerfile

@@ -12,6 +12,6 @@ USER 1001
 # TODO: do we need to use a cache folder here? 
 ENV npm_config_cache=/tmp/opt/cache
 RUN mkdir -p /tmp/opt/cache && \
-    npm install --location=global ovsx@0.8.3 --prefix /tmp/opt/ovsx --cache /tmp/opt/cache && chmod -R g+rwX /tmp/opt/ovsx && \
+    npm install --location=global @vscode/vsce@2.24.0 ovsx@0.8.3 --prefix /tmp/opt/ovsx --cache /tmp/opt/cache && chmod -R g+rwX /tmp/opt/ovsx && \
     tar -czf ovsx.tar.gz /tmp/opt/ovsx && \
     chmod g+rwX /opt/app-root/src/ovsx.tar.gz