Do not derive {{auto}} IPs when toggle is off

[jjbayer]

The project setting "Prevent storing of IP addresses" is currently implemented by IP scrubbing. To be on the safe side, we should not even convert {{ auto }} IPs to actual IPs if this setting is enabled.

relay/relay-event-normalization/src/event.rs

Lines 67 to 69 in ba0bd36

	/// When `{{auto}}` is specified and there is no other IP address in the payload, such as in the
	/// `request` context, this IP address gets added to the `user` context.
	pub client_ip: Option<&'a IpAddr>,

[Dav1dde]

Turns out we have 3 platforms for which {{auto}} inference is ignored, maybe instead, or additional, we introduce {{auto}} to these SDKs and platforms and after a reasonable migration period we drop this exception from Relay:

relay/relay-event-normalization/src/event.rs

Lines 462 to 467 in fc25ba9

	if user.ip_address.value().is_none() {
	// In an ideal world all SDKs would set {{auto}} explicitly.
	if let Some("javascript") | Some("cocoa") | Some("objc") = platform {
	user.ip_address = Annotated::new(client_ip.to_owned());
	}
	}