Replace K8s 1.21.3 with 1.21.8

In testing K8s 1.21.8 used less CPU than 1.21.3, so we are moving to
the newer version.

This has been booted in vbox and a basic pod has been started.
A full regression will be performed.

Partial-Bug: 1957994
Depends-On: https://review.opendev.org/c/starlingx/integ/+/824803
Change-Id: If27099aac6852b8b50f1f6d8d37ddf27d6a108ac
Signed-off-by: Chris Friesen <chris.friesen@windriver.com>

playbookconfig/src/playbooks/roles/bootstrap/bringup-essential-services/templates/k8s-v1.21.3

@@ -1 +0,0 @@
-k8s-v1.19.13/

playbookconfig/src/playbooks/roles/bootstrap/validate-config/vars/main.yml

@@ -8,8 +8,8 @@ private_pxeboot_subnet: 169.254.202.0/24
 pxecontroller_floating_hostname: pxecontroller
 use_entire_pxeboot_subnet: true
 
-upgrade_k8s_version: 1.21.3
-fresh_install_k8s_version: 1.21.3
+upgrade_k8s_version: 1.21.8
+fresh_install_k8s_version: 1.21.8
 
 # These variables are only used for subcloud configuration and are set
 # automatically by dcmanager

playbookconfig/src/playbooks/roles/common/load-images-information/vars/k8s-v1.21.8

@@ -0,0 +1 @@
+k8s-v1.19.13

playbookconfig/src/playbooks/roles/k8s-storage-backends/snapshot-controller/files/k8s-v1.21.3

@@ -1 +0,0 @@
-k8s-v1.18.1/

playbookconfig/src/playbooks/roles/k8s-storage-backends/snapshot-controller/files/k8s-v1.21.8

@@ -0,0 +1 @@
+k8s-v1.18.1

playbookconfig/src/playbooks/roles/k8s-storage-backends/snapshot-controller/templates/k8s-v1.21.3

@@ -1 +0,0 @@
-k8s-v1.18.1/

playbookconfig/src/playbooks/roles/k8s-storage-backends/snapshot-controller/templates/k8s-v1.21.8

@@ -0,0 +1 @@
+k8s-v1.18.1