scrubber: add remote_storage based listing APIs and use them in find-large-objects

[arpad-m]

Add two new functions stream_objects_with_retries and stream_tenants_generic and use them in the find-large-objects subcommand, migrating it to remote_storage.

Also adds the size field to the ListingObject struct.

Part of #7547

[skyzh]

LGTM. It's worth noting that list_streaming could be an infinite stream if there is an error. The user of this stream should control the number of next calls and stop if there is a repeated error.

[arpad-m]

I have pushed two commits for yielding errors and ending the stream. Note that we already would end the stream when encountering an error: retryable errors would be retried but any other errors we'd yield immediately, and higher up the chain we'd exit at any error immediately (retried errors would not show up if a later attempt is successful).

[github-actions]

3138 tests run: 3017 passed, 0 failed, 121 skipped (full report)

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Code coverage* (full report)

• functions: 32.8% (7022 of 21389 functions)
• lines: 50.0% (55881 of 111716 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
58e38a0 at 2024-07-30T09:09:15.740Z :recycle:}