virt: support detection of Apple Virtualization guests with cpuid

This is a supplement to #24419. On macOS Intel machines, detection needs to be done through cpuid.
In macOS, `dmi_vendors` detection is only applicable to M series.

Signed-off-by: Black-Hole1 <bh@bugs.cc>

src/basic/virt.c

@@ -54,6 +54,7 @@ static Virtualization detect_vm_cpuid(void) {
                 { "ACRNACRNACRN", VIRTUALIZATION_ACRN      },
                 /* https://www.lockheedmartin.com/en-us/products/Hardened-Security-for-Intel-Processors.html */
                 { "SRESRESRESRE", VIRTUALIZATION_SRE       },
+                { "Apple VZ",     VIRTUALIZATION_APPLE     },
         };
 
         uint32_t eax, ebx, ecx, edx;