fix(v7/cdn): Ensure _sentryModuleMetadata is not mangled (#14357)

Creating a corresponding PR to v7 for this fix:
#14344
This should solve
#14343 in v7.

Author: gilisho

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

@@ -139,6 +139,8 @@ export function makeTerserPlugin() {
           // For v7 backwards-compatibility we need to access txn._frozenDynamicSamplingContext
           // TODO (v8): Remove this reserved word
           '_frozenDynamicSamplingContext',
+          // This is used in metadata integration
+          '_sentryModuleMetadata',
         ],
       },
     },