Pin firecracker to v0.25.2-macvtap for e2e tests

Author: Callisto13

test/tools/config/userdata.sh

@@ -52,7 +52,7 @@ if [[ -z "$SKIP_DIRECT_LVM" ]]; then
 fi
 
 # install latest firecracker
-./flintlock/hack/scripts/provision.sh firecracker
+./flintlock/hack/scripts/provision.sh firecracker --version v0.25.2-macvtap
 
 # install and setup containerd
 curl -sL https://api.github.com/repos/containerd/containerd/releases/latest 2>/dev/null |