[CI] Fix Terraform Reconciliation Issue around Units

This patch updates the operationa metrics Cron job to use Mi for the memory
requests rather than Gi as k8s will automatically convert them to Mi for
decimal number of Gi which terraform then thinks differs from what it tried
to apply. This leads to terraform trying to reapply the setting everytime
one runs terraform apply despite the settings already being equivalent.

Author: boomanaiden154

premerge/operational_metrics_cronjob.yaml

@@ -38,7 +38,10 @@ spec:
             resources:
               requests:
                 cpu: "250m"
-                memory: "1.75Gi"
+                # We explicitly use Mi here instead of a decimal number of
+                # Gi because k8s will automatically convert to Mi which
+                # terraform then thinks differs from what it intended to apply.
+                memory: "1792Mi"
               limits:
                 cpu: "2"
                 memory: "2Gi"