Pass our VERSION to sentry plugin's release arg via env (#19474)

Use our existing VERSION, deduced by the packaging script, as the release for sentry sourcemaps.

This will be undefined for dev builds.

scripts/package.sh

@@ -9,7 +9,7 @@ else
 fi
 
 yarn clean
-yarn build
+VERSION=$version yarn build
 
 # include the sample config in the tarball. Arguably this should be done by
 # `yarn build`, but it's just too painful.

webpack.config.js

@@ -532,9 +532,10 @@ module.exports = (env, argv) => {
             // upload to sentry if sentry env is present
             process.env.SENTRY_DSN &&
                 new SentryCliPlugin({
-                    release: process.env.RELEASE,
+                    release: process.env.VERSION,
                     include: "./webapp",
                 }),
+            new webpack.EnvironmentPlugin(['VERSION']),
         ].filter(Boolean),
 
         output: {