pageserver: improve the shutdown log error

[duguorong009]

Problem

• Close pageserver: don't log error when shutting down tenant during page_service request #5784

Summary of changes

• Update the GetActiveTenantError -> QueryError conversion process in pageserver/src/page_service.rs
• Update the pytest logging exceptions in ./test_runner/regress/test_tenant_detach.py

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

[jcsp]

Thanks for opening this: it's doing the right thing, but will need a small update after #5367 merges, since that modifies how the error type works: GetActiveTenantError gets explicit WillNotBecomeActive and Cancelled variants, so the change to from() will need to handle those.

I should have mentioned in the original issue that this was follow-on for 5367 -- I didn't anticipate anyone being to fast to open a PR for it :-) (but it's appreciated!)

[duguorong009]

@jcsp
Can you add approved-for-ci-run label for CI running & merge if you think PR is ready?

[github-actions]

2370 tests run: 2255 passed, 0 failed, 115 skipped (full report)

---

Flaky tests (3)

Postgres 14

• test_crafted_wal_end[last_wal_record_xlog_switch_ends_on_page_boundary]: debug
• test_eviction_across_generations: debug
• test_timeline_deletion_with_files_stuck_in_upload_queue: debug

Code coverage (full report)

• functions: 54.8% (8904 of 16257 functions)
• lines: 81.7% (51275 of 62762 lines)

---

_{The comment gets automatically updated with the latest test results
14f3f4f at 2023-11-07T16:54:09.961Z :recycle:}