tools: improve prerequisites for test-all-suites

The prerequisistes for test-all-suites were running some tests
themselves. When one of those tests failed during a coverage run, it
resulted in artificially low coverage. Fix the prerequisites to only
build stuff, not test.

PR-URL: https://github.com/nodejs/node/pull/25892


Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>