fix(cmake): anchor the macOS guest address space for all full-emulator tests
Every target created by add_kyty_full_emulator_test links against the
full kyty_emulator sources, so it drags in the same 620 GiB .zerofill
guest address space segments as the emulator itself. Only the emulator
target and virtual_memory_allocation_tests had the linker flags that
anchor those segments; every other full-emulator test target got the
segments without the anchoring, and the kernel killed them on exec
(posix_spawn EIO / SIGKILL) before main() ever ran.
Move the configure_macos_guest_address_space() call into
add_kyty_full_emulator_test() itself so every target it creates gets
it automatically, and drop the now-redundant explicit call on
virtual_memory_allocation_tests.
macOS compiles the existing POSIX/Linux code paths (KYTY_PLATFORM_LINUX)
targeting x86_64 under Rosetta 2. Adds an APPLE branch to the build:
selects Apple's ld64 linker, unsets the Ninja response-file forcing (Apple
ar has no @file support), derives the target arch from CMAKE_OSX_ARCHITECTURES
for cpuinfo/ffmpeg, and re-signs the binary post-build with JIT entitlements
(required to execute written trampolines and Rosetta-translated guest code).
All changes are guarded by if(APPLE); Windows and Linux configuration is
unchanged.
(cherry picked from commit 13be13b7573b9a687cf87531a81e4497ed3de1d5)
Stepz97