Remove "operation" field from /sse/hub-cache, and add `?all=true`
Required by https://github.com/huggingface/moon-landing/pull/7456#discussion_r1328913356 and https://github.com/huggingface/moon-landing/pull/7456#discussion_r1328910039 (internal)
Remove "operation" field from /sse/hub-cache, and add `?all=true`: Required by https://github.com/huggingface/moon-landing/pull/7456#discussion_r1328913356 and https://github.com/huggingface/moon-landing/pull/7456#discussion_r1328910039 (internal)