Fix NLS mismatch in debug workspaces (#21367)

The REH server COPY overlays /vscode-reh-linux-x64/ onto /vscode-web/ in
/ide/, overwriting the web client's NLS files with the REH server's version.
Normal workspaces are unaffected because blobserve reads only the first Docker
layer. Debug workspaces serve from the merged filesystem, causing workbench.js
to reference NLS indices that don't exist in the REH's nls.messages.js.

Restore the web client NLS files after the REH overlay.

Co-authored-by: Ona <no-reply@ona.com>

Author: kylos101

components/ide/code/leeway.Dockerfile

@@ -148,6 +148,11 @@ FROM scratch
 # copy static web resources in first layer to serve from blobserve
 COPY --from=code_builder --chown=33333:33333 /vscode-web/ /ide/
 COPY --from=code_builder --chown=33333:33333 /vscode-reh-linux-x64/ /ide/
+# Restore web client NLS files overwritten by REH copy
+COPY --from=code_builder --chown=33333:33333 /vscode-web/out/nls.messages.js /ide/out/nls.messages.js
+COPY --from=code_builder --chown=33333:33333 /vscode-web/out/nls.messages.json /ide/out/nls.messages.json
+COPY --from=code_builder --chown=33333:33333 /vscode-web/out/nls.keys.json /ide/out/nls.keys.json
+COPY --from=code_builder --chown=33333:33333 /vscode-web/out/nls.metadata.json /ide/out/nls.metadata.json
 
 ARG CODE_VERSION
 ARG CODE_COMMIT