Enforce timeout & retries on `alert_discord` such that

[0ex-d]

Currently we report panics to a crash.log file and give users an option to send it to discord for concrete logging.
Possible scenario the http request might fail or hog resources especially with it's blocking nature.

helix/crates/utils/src/lib.rs

Lines 108 to 114 in f5e222e

	let client = reqwest::blocking::Client::new();
	let result = client.post(webhook_url).json(&payload).send();
	if let Err(err) = result {
	error!(error=?err, "could not send alert to Discord\nMessage: {message}");
	}

Solution:

• Add timeout to limit resource consumption.
• Use retry mechanism to ensure panics are reported reliably.