Bump centos8 CI job memory to 3go and remove mitogen for fedora CI (#7921)

.gitlab-ci/packet.yml

@@ -177,15 +177,11 @@ packet_fedora33-calico:
   stage: deploy-part2
   extends: .packet_periodic
   when: on_success
-  variables:
-    MITOGEN_ENABLE: "true"
 
 packet_fedora34-calico-selinux:
   stage: deploy-part2
   extends: .packet_periodic
   when: on_success
-  variables:
-    MITOGEN_ENABLE: "true"
 
 packet_amazon-linux-2-aio:
   stage: deploy-part2

tests/cloud_playbooks/roles/packet-ci/templates/vm.yml.j2

@@ -31,7 +31,7 @@ spec:
         cpu:
             cores: {{ vm_cpu_cores }}
             sockets: {{ vm_cpu_sockets }}
-            threads: {{ vm_cpu_cores }}
+            threads: {{ vm_cpu_threads }}
         resources:
           requests:
             memory: {{ vm_memory * memory_allocation_ratio }}

tests/files/packet_centos8-calico.yml

@@ -2,6 +2,7 @@
 # Instance settings
 cloud_image: centos-8
 mode: default
+vm_memory: 3072Mi
 
 # Kubespray settings
 kube_network_plugin: calico