[antlir2][vm] add library for qemu-system

Summary:
The antlir's qemu build shared with OSS needs additional libraries to
work. Otherwise we run into the following errors:
antlir/vm/runtime/__qemu-system-x86_64__/out/qemu-system-x86_64: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory
antlir/vm/runtime/__qemu-system-x86_64__/out/qemu-system-x86_64: error while loading shared libraries: libpixman-1.so.0: cannot open shared object file: No such file or directory

While we do have internal qemu builds that don't need them, there is no reason to divert for simple dependencies. Add them to the container image for the VM, so we can use qemu from antlir instead of tp2.

Test Plan:
Run VM with D44926488 and verify VM boots.
```
MetalOS MetalOS (8477885015c7ed7bd33229ec51dc85c86fc4e053)
Kernel 5.6.13-0_fbk21_hardened_6114_gcde3142b1765 on an x86_64

localhost login: root (automatic login)
+======================================+
| ___  ___     _        _ _____ _____  |
| |  \/  |    | |      | |  _  /  ___| |
| | .  . | ___| |_ __ _| | | | \ `--.  |
| | |\/| |/ _ \ __/ _` | | | | |`--. \ |
| | |  | |  __/ || (_| | \ \_/ /\__/ / |
| \_|  |_/\___|\__\__,_|_|\___/\____/  |
|                                      |
+======================================+
[root@localhost ~]#
```

Differential Revision: D47278925

fbshipit-source-id: 852dd772db9e2ab41d6397fb9e21d56b06677b82

antlir/antlir2/antlir2_vm/BUCK

@@ -33,7 +33,9 @@ image.layer(
         feature.rpms_install(rpms = [
             "glib2",  # for virtiofsd
             "iproute",  # for NIC configuration
+            "numactl-libs",  # for qemu-system
             "openssh-clients",  # for ssh shell
+            "pixman",  # for qemu-system
             "systemd-container",  # for systemd-detect-virt
         ]),
         feature.install(