Lőrinc 9eba3aafa6 test: avoid undersized Boost.Test signal stacks ...

Boost.Test registers a `SIGSTKSZ` alternate signal stack as each test binary starts, before any tests run.
On musl, this can be smaller than Linux's hardware-dependent minimum, causing `sigaltstack()` to fail with `ENOMEM` during setup.

Disable Boost.Test's alternate stack in both test entry points.
Signal handlers continue to use the regular process stack. Boost.Test can no longer report stack overflows.

Fixes #36026

Co-authored-by: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>

2026-08-20 10:10:23 -07:00

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