Extract safekeeper per timeline state from safekeeper.rs

[arssher]

[github-actions[bot]]

2238 tests run: 2154 passed, 0 failed, 84 skipped (full report)

---

Flaky tests (1)

Postgres 16

• test_multi_attach: debug

Code coverage (full report)

• functions: 54.7% (10191 of 18640 functions)
• lines: 81.6% (58507 of 71726 lines)

---

_{The comment gets automatically updated with the latest test results
a09e3598204c26a1d8e2ea8bec406b7e68a4163b at 2024-01-11T17:12:16.658Z :recycle:}