[Breaking Change] Replay options `unblock` and `unmask` will require explicit opt-in

[billyvg]

Currently, we have default selectors configured for unblock and unmask options for Replay. This means we have to perform additional DOM queries even if you do not use the unmasking features. In version 8.0 of the Replay SDK, we will change these options to default to false and you will need to specify selectors to be used for the respective unmasking options.

If you currently use the default Sentry selectors for unblock and unmask, then we recommend you to explicitly specify them in your configuration:

Sentry.init({
  integrations: [
    Sentry.Replay({
      unblock: '.sentry-unblock, [data-sentry-unblock]',
      unmask: '.sentry-unmask, [data-sentry-unmask]',
    }),
  ]
});