Add new compute metrics to sql exporter

[hlinnaka]

These are the perf counters added in commit 263dfba.

Note: This relies on 'neon' extension version 1.5. The default was bumped to 1.5 in commit d696c41.

[github-actions]

5048 tests run: 4890 passed, 0 failed, 158 skipped (full report)

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Flaky tests (7)

Postgres 17

• test_pg_regress[None]: release-arm64

Postgres 16

• test_ondemand_wal_download_in_replication_slot_funcs: release-x86-64

Postgres 15

• test_ondemand_wal_download_in_replication_slot_funcs: release-arm64

Postgres 14

• test_total_size_limit: release-arm64
• test_pageserver_small_inmemory_layers[False]: release-arm64
• test_idle_checkpoints: release-arm64
• test_pageserver_small_inmemory_layers[True]: release-arm64

Code coverage* (full report)

• functions: 31.3% (7489 of 23904 functions)
• lines: 49.6% (60099 of 121237 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
09f9689 at 2024-10-01T14:32:38.753Z :recycle:}

[MMeent]

Note also that this needs to update the default Neon extension version to 1.5 if that hasn't been done already

[hlinnaka]

Note also that this needs to update the default Neon extension version to 1.5 if that hasn't been done already

Yes, that was done in commit d696c41. But good point, I'll call that out in the commit message.