fix(cdn): Do not mangle _metadata (#13426)

Noticed that this is mangled on the `options` in the CDN, which it
probably shouldn't be...

Author: mydea

dev-packages/rollup-utils/plugins/bundlePlugins.mjs

@@ -116,6 +116,8 @@ export function makeTerserPlugin() {
           '_integrations',
           // _meta is used to store metadata of replay network events
           '_meta',
+          // We store SDK metadata in the options
+          '_metadata',
           // Object we inject debug IDs into with bundler plugins
           '_sentryDebugIds',
           // These are used by instrument.ts in utils for identifying HTML elements & events