fix: calculate nomad_cpu_total_compute on arm & arm64

Works around the issue reported in hashicorp/nomad#2638

tasks/main.yml

@@ -82,6 +82,17 @@
   notify:
     - restart nomad
 
+- name: Calculate nomad_cpu_total_compute for amd64
+  shell: >-
+    cpu_freq="$(dmidecode -t 4 | grep 'Current Speed' | sed 's/.*: //' | sed 's/ .*//' | awk '{s+=$1} END {print s}')"
+    cpu_count=$(dmidecode -t 4 | grep 'Core Enabled' | sed 's/.*: //' | sed 's/ .*//' | awk '{s+=$1} END {print s}')
+    echo $(( $cpu_count * $cpu_freq ))
+  args:
+    executable: /bin/bash
+  register: nomad_cpu_total_compute
+  when:
+    - nomad_architecture in ['arm', 'arm64']
+
 - name: Client configuration
   template:
     src: client.hcl.j2