GCS (Guarded Control Stack) support is missing

[ggardet]

Describe the bug When building with GCC15+, binutils 2.44+, glibc 2.41+ and -mbranch-protection=standard on (openSUSE Tumbleweed) aarch64, this enables PAC, BTI and GCS (Guarded Control Stack). PAC and BTI are already supported, but GCS support is missing.

More details on GCS:

• https://community.arm.com/arm-community-blogs/b/tools-software-ides-blog/posts/gcc-15-continuously-improving#guarded
• https://docs.kernel.org/next/arch/arm64/gcs.html

Environment (please complete the following information):

• OS: openSUSE Tumbleweed aarch64
• Bitdepth: 64-bit
• GPU: N/A
• Graphics Driver: N/A
• SDK or header version if building from repo: 1.4.328.0
• Enabled layers:

To Reproduce Rebuild for aarch64 with GCC15+, binutils 2.44+, glibc 2.41+ and -mbranch-protection=standard

VK_LOADER_DEBUG output N/A

Additional context