Add support for 3rd Party JavaScript Flagging

[smeubank]

The thirdPartyErrorFilterIntegration allows you to filter out errors originating from third parties, such as browser extensions, code-injecting browsers, or widgets from third-party services that also use Sentry. This integration can be very helpful in reducing noise that's not related to your own application code.

Users are requesting support for this feature via the sentry-cli as well

Generally everything possible with the plugins would ideally be possible with the cli. Taggin errors based on their origin user code or 3rd party, and optionally dropping or sending with the tag.