test: bump pglite version

[190n]

What does this PR do?

Bumps the version of PGlite we test from 0.2.15 to 0.2.16. This test was introduced in #16188 because older versions of the IPInt Wasm interpreter had errors with PGlite ("Out of bounds memory access"). But it turns out 0.2.15 had another issue ("Out of bounds call_indirect") that affects (at least on macOS aarch64) all versions of Bun I've tried, regardless of the Wasm backend used (more discussion at electric-sql/pglite#486).

I'm still investigating why this test had not been failing in CI.

How did you verify your code works?

Ran the new PGlite test.

[robobun]

^{Updated 12:43 PM PT - Feb 6th, 2025}

❌ @190n, your commit 15f44c1 has 2 failures in Build #11207:

• test/cli/install/bun-install-registry.test.ts - 2 failing on 🪟 2019 x64
• test/cli/install/bun-install-registry.test.ts - 2 failing on 🪟 2019 x64-baseline
• test/js/web/fetch/fetch.test.ts - 1 failing on 🍎 13 aarch64

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🧪   try this PR locally:

bunx bun-pr 17117