enable tpm simulation for virtual machines

This commit:
 - Appends the libvirt VM definition xml templates to include tpm simulation.

This commit is needed to enable the testing of use-cases where tpm features
e.g. disk encryption, remote secure boot attestation, random hash generation,
measured boot etc are used.

Signed-off-by: Adam Rozman <[email protected]>

Author: Rozzii

vm-setup/roles/libvirt/templates/baremetalvm.xml.j2

@@ -44,6 +44,9 @@
   <on_reboot>restart</on_reboot>
   <on_crash>restart</on_crash>
   <devices>
+    <tpm model="tpm-tis">
+      <backend type="emulator" version="2.0"/>
+    </tpm>
     <disk type="file" device="cdrom">
       <target dev='{{ libvirt_cdromdev }}' bus='{{ libvirt_cdrombus }}'/>
       <readonly/>