tests: add test_timeline_archival_chaos

[jcsp]

Problem

• We lack test coverage of cases where multiple timelines fight for updates to the same manifest (pageserver: make concurrent offloaded timeline operations safe wrt manifest uploads #9557), and in timeline archival changes while dual-attached (pageserver: generation-aware storage for TenantManifest #9555)

Summary of changes

• Add a chaos test for timeline creation->archival->offload->deletion

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• Do we need to implement analytics? if so did you add the relevant metrics to the dashboard?
• If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section.

Checklist before merging

• Do not forget to reformat commit message to not include the above checklist

[github-actions]

5409 tests run: 5175 passed, 0 failed, 234 skipped (full report)

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Code coverage* (full report)

• functions: 31.8% (7889 of 24840 functions)
• lines: 49.4% (62446 of 126335 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
9c590a1 at 2024-11-14T12:54:13.420Z :recycle:}

[arpad-m]

The CI failures on postgres 16 look legit, they also affect the test_timeline_archival_chaos test.