vmm: Add support for resizing the memory used by the VM

For now the new memory size is only used after a reboot but support for
hotplugging memory will be added in a later commit.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

vmm/src/api/mod.rs

@@ -116,6 +116,7 @@ pub struct VmmPingResponse {
 #[derive(Clone, Deserialize, Serialize)]
 pub struct VmResizeData {
     pub desired_vcpus: Option<u8>,
+    pub desired_ram: Option<u64>,
 }
 
 pub enum ApiResponsePayload {

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

@@ -432,3 +432,5 @@ components:
         desired_vcpus:
           minimum: 1
           type: integer
+        desired_ram:
+          type: integer