Add retries for `upload-proguard` command for 507 status

[szokeasaurusrex]

The upload_dif_archive function sometimes results in intermittent 507 failures, and we should retry these. Currently, in the upload-proguard command, we do not have any retries, so let's add these.

sentry-cli/src/api/mod.rs

Lines 1404 to 1417 in 8b89630

	pub fn upload_dif_archive(&self, project: &str, file: &Path) -> ApiResult<Vec<DebugInfoFile>> {
	let path = format!(
	"/projects/{}/{}/files/dsyms/",
	PathArg(self.org),
	PathArg(project)
	);
	let mut form = curl::easy::Form::new();
	form.part("file").file(file).add()?;
	self.request(Method::Post, &path)?
	.with_form_data(form)?
	.progress_bar_mode(ProgressBarMode::Request)?
	.send()?
	.convert()
	}