fix regress ci problems

[Emilgardis]

follow up to #728

[Emilgardis]

/ci diff pr

[github-actions]

Diff for comment

• pr

[burrbull]

Looks like diff downloads SVD twice for baseline and current. Does it?

[Emilgardis]

Yes it does, theres a fixme to fix that

svd2rust/ci/svd2rust-regress/src/svd_test.rs

Lines 237 to 246 in 76cd523

	tracing::info!("Downloading SVD");
	// FIXME: Avoid downloading multiple times, especially if we're using the diff command
	let svd_url = &self.svd_url();
	let svd = reqwest::blocking::get(svd_url)
	.with_context(|| format!("Failed to get svd URL: {svd_url}"))?
	.error_for_status()
	.with_context(|| anyhow!("Response is not ok for svd url"))?
	.text()
	.with_context(|| "SVD is bad text")?;

The fix would probably be to download once and copy/link to respective output folder, then inside setup_case check if the svd already exists and is "new"