Order-agnostic rrd compare command + snippet clean up

[teh-cmc]

See:

/// If specified, the comparison will focus purely on semantics, ignoring order.
///
/// The Rerun data model is itself unordered, and because many of the internal pipelines are
/// asynchronous by nature, it is very easy to end up with semantically identical, but
/// differently ordered data.
/// In most cases, the distinction is irrelevant, and you'd rather the comparison succeeds.
#[clap(long, default_value_t = false)]
unordered: bool,

[github-actions]

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Result	Commit	Link	Manifest
❌		https://rerun.io/viewer/pr/8843	+nightly +main

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