feat(compute_ctl): use TLS if configured

[conradludgate]

If control-plane reports that TLS should be used, load the certificates (and watch for updates), make sure postgres use them, and detects updates.

[github-actions]

7744 tests run: 7365 passed, 0 failed, 379 skipped (full report)

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Flaky tests (1)

Postgres 17

• test_migration_to_cold_secondary: release-x86-64-without-lfc

Code coverage* (full report)

• functions: 32.7% (8638 of 26403 functions)
• lines: 48.6% (73192 of 150660 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
1a94cf4 at 2025-02-27T15:39:59.291Z :recycle:}