message: fix(replay): Do not mangle `_metadata` in client options
  Exclude the `_metadata` field from being mangled which caused invalid replay envelope headers
diff: @@ -109,6 +109,7 @@ export function makeTerserPlugin() {
  '_support',
  // TODO: Get rid of these once we use the SDK to send replay events
  '_prepareEvent', // replay uses client._prepareEvent
  + '_metadata', // replay uses client.getOptions()._metadata
  ],
  },
  },
  