test: fix logalloc_test in dev regression CI

[darwin67]

Context

The dev-mode PR regression suite currently skips boost.logalloc_test in test/boost/suite.yaml.

This was skipped while enabling full regression CI because the inherited ScyllaDB-derived test fails in the GitHub Actions dev build, independent of the CI harness changes.

Observed failure

Run: https://github.com/inngest/ssdb/actions/runs/26493036621/job/78015374701

Failing test:

• boost.logalloc_test.1

Failure excerpt:

logalloc_test: utils/logalloc.cc:2008: virtual logalloc::region_impl::~region_impl(): Assertion `desc.is_empty()` failed.
Test exited with code -6

Current workaround

test/boost/suite.yaml has skip_in_dev: [logalloc_test] so PR dev regression CI can run the rest of the inherited boost suite.

Done when

• The root cause is fixed or the test is intentionally assigned to a different mode.
• The skip_in_dev entry for logalloc_test is removed or replaced with a documented permanent policy.
• PR regression CI remains green.