ci: install nextest in the daemon-lifecycle job

The job now runs `cargo nextest run --locked -p neomacs --test
daemon_lifecycle`, but its setup-rust step never asked for nextest: the old
flow reached `cargo test` through `cargo xtask test-daemon-lifecycle`, which
needed no nextest at all.  Without the install the job dies before building
anything:

    error: no such command: `nextest`
    ##[error]Process completed with exit code 101

Every other nextest-using job in this workflow passes `install-nextest: true`;
this one now does too.  Caught by the test-suite run for main 37115597587
(job 111181701603).

That run's `workspace test archive` failure is unrelated: a compile error in
b845d16 ("test(gc): generational verifier and stress"),
`error[E0599] no method named debug_assert_remembered_membership` at
crates/neovm-core/src/tagged/gc/tests/generational_tests.rs:86.

The same run's build log confirms the new generation path works on the
runner -- "regenerated lisp/international/cp51932.el from cp51932.awk (GNU
admin/charsets/Makefile.in:213-214)", and the same for eucjp-ms.el.

Author: eval-exec

.github/workflows/test-suite.yml

@@ -91,6 +91,7 @@ jobs:
           cache-key: ci-daemon-lifecycle-linux
           cache-shared-key: linux-debug-daemon-lifecycle
           cache-save-if: ${{ github.ref == 'refs/heads/main' }}
+          install-nextest: true
       - name: Set up pinned GNU Emacs client for interoperability
         uses: ./.github/actions/setup-gnu-emacs
       - name: Require the installed GNU client