runtime-rs: implement set_capabilities for qemu

After the qemu VM is booted, while storing the guest details,
it fails to set capabilities as it is not yet implemented
for QEMU, this change adds a default implementation for it.

Signed-off-by: Amulyam24 <amulmek1@in.ibm.com>

src/runtime-rs/crates/hypervisor/src/qemu/inner.rs

@@ -617,8 +617,10 @@ impl QemuInner {
         todo!()
     }
 
-    pub(crate) fn set_capabilities(&mut self, _flag: CapabilityBits) {
-        todo!()
+    pub(crate) fn set_capabilities(&mut self, flag: CapabilityBits) {
+        let mut caps = Capabilities::default();
+
+        caps.set(flag)
     }
 
     pub(crate) fn set_guest_memory_block_size(&mut self, size: u32) {