clh: Cloud Hypervisor has a built-in Rate Limiter

The notion of "built-in rate limiter" was added as part of
bd8658e362, and that commit considered
that only Firecracker had a built-in rate limiter, which I think was the
case when that was introduced (mid 2020).

Nowadays, however, Cloud Hypervisor takes advantage of the very same crate
used by Firecraker to do I/O throttling.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

src/runtime/virtcontainers/clh.go

@@ -1497,5 +1497,5 @@ func (clh *cloudHypervisor) vmInfo() (chclient.VmInfo, error) {
 }
 
 func (clh *cloudHypervisor) IsRateLimiterBuiltin() bool {
-	return false
+	return true
 }