Bump default Debian version to Bookworm everywhere

[bayandin]

Problem

We have a couple of CI workflows that still run on Debian Bullseye, and the default Debian version in images is Bullseye as well (we explicitly set building on Bookworm)

Summary of changes

• Run pgbench-pgvector on Bookworm (fix a couple of packages)
• Run trigger_bench_on_ec2_machine_in_eu_central_1 on Bookworm
• Change default DEBIAN_VERSION in Dockerfiles to Bookworm
• Make pinned docker tag an alias to pinned-bookworm

[bayandin]

• 🟢 CI(pgbench-pgvector): https://github.com/neondatabase/neon/actions/runs/11988658653
• 🟢 CI(trigger_bench_on_ec2_machine_in_eu_central_1): https://github.com/neondatabase/neon/actions/runs/11988642899

[github-actions]

5607 tests run: 5371 passed, 0 failed, 236 skipped (full report)

---

Flaky tests (1)

Postgres 14

• test_replica_query_race: release-x86-64

Code coverage* (full report)

• functions: 31.0% (7973 of 25720 functions)
• lines: 48.8% (63277 of 129701 lines)

* collected from Rust tests only

---

_{The comment gets automatically updated with the latest test results
a106552 at 2024-11-24T00:18:12.615Z :recycle:}