glibc: APX enablement for the dynamic linker [rhel-10]

Feature: Support dynamic linking of Intel APX-enabled functions Reason: Changes are required to enable Intel APX applications. For now, an incompatible dynamic linker trampoline has been identified as a potential source of incompatibilities. One workaround for that is to use BIND_NOW, or use only standard calling convention. Result: The dynamic linker now knows to preserve APX-related registers.  While this is normally not something visible to the user, it has a tiny impact on the amount of space needed beyond the top of stack.  Users who strictly limit this space may need to adjust or evaluate the stack limits.