vmm: api: Expose SEV-SNP and igvm related options

This involves the platform  and VM config.

Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>

vmm/src/api/openapi/cloud-hypervisor.yaml

@@ -548,6 +548,10 @@ components:
           type: string
         initramfs:
           type: string
+        igvm:
+          type: string
+        host_data:
+          type: string
       description: Payloads to boot in guest
 
     VmConfig:
@@ -732,6 +736,9 @@ components:
         tdx:
           type: boolean
           default: false
+        sev_snp:
+          type: boolean
+          default: false
 
     MemoryZoneConfig:
       required: