fix(pageserver): handle version number in draw timeline

[skyzh]

Problem

We now have a vX number in the file name, i.e., 000000067F0000000400000B150100000000-000000067F0000000400000D350100000000__00000000014B7AC8-v1-00000001

The related pull request for new-style path was merged a month ago #7660

Summary of changes

Fixed the draw timeline dir command to handle it.

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]

2916 tests run: 2799 passed, 0 failed, 117 skipped (full report)

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Flaky tests (1)

Postgres 14

• test_subscriber_restart: release

Code coverage* (full report)

• functions: 32.5% (6875 of 21131 functions)
• lines: 50.0% (53384 of 106774 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
39bb15d at 2024-06-24T15:38:07.838Z :recycle:}

[arpad-m]

ideally there'd be some tests, but as there is no tests right now it's fine to merge as is.