fix: Break out of the loop when we reach cursor limit for list_release_files

[kamilogorek]

Workaround for the small regression introduced in #1275 that happens in usecases where over 20k of files are uploaded for a single release.

Potential improvement is explained in the comment:

Instead of breaking out of the loop here when we reach the limit
(200 pages of 100 items, for a total of 20_000 files), we should send a list of hashes
to the server, perform an intersection there, and change the upload mechanism
to leave out only those files that were gave back to us by the server.
This would also limit number of API requests for deduping from N=[1:200] to 1.

Related DIFs functionality that we can reuse here:

1. https://github.com/getsentry/sentry/blob/f9bf16e7d663c780c1e0c0378ae92f2a93aa326b/src/sentry/api/urls.py#L1941-L1945
2. https://github.com/getsentry/sentry/blob/f9bf16e7d663c780c1e0c0378ae92f2a93aa326b/src/sentry/api/endpoints/debug_files.py#L248-L255

3. sentry-cli/src/api.rs

   Lines 1005 to 1030 in 2cac02b

   	/// Given a list of checksums for DIFs, this returns a list of those
   	/// that do not exist for the project yet.
   	pub fn find_missing_dif_checksums<I>(
   	&self,
   	org: &str,
   	project: &str,
   	checksums: I,
   	) -> ApiResult<HashSet<Digest>>
   	where
   	I: IntoIterator<Item = Digest>,
   	{
   	let mut url = format!(
   	"/projects/{}/{}/files/dsyms/unknown/?",
   	PathArg(org),
   	PathArg(project)
   	);
   	for (idx, checksum) in checksums.into_iter().enumerate() {
   	if idx > 0 {
   	url.push('&');
   	}
   	url.push_str("checksums=");
   	url.push_str(&checksum.to_string());
   	}
   	let state: MissingChecksumsResponse = self.get(&url)?.convert()?;
   	Ok(state.missing)

Fixes #1306

[kamilogorek]

"Make clippy happy"