Align default values for Windows instances (#9560)

So far, prd-p02 was defining the archDefaults for Windows as
'windows-amd64' while staging and the 'host-config.yaml' file
were using 'windows'. Given multi-arch builds are a requirement,
is better to align the archDefaults to 'windows-amd64'.

Author: oswcab

components/multi-platform-controller/base/host-config-chart/templates/host-config.yaml

@@ -40,7 +40,7 @@ data:
 
   {{- $arm := (index .Values "archDefaults" "arm64") | default (dict) }}
   {{- $amd := (index .Values "archDefaults" "amd64") | default (dict) }}
-  {{- $windows := (index .Values "archDefaults" "windows") | default (dict) }}
+  {{- $windows := (index .Values "archDefaults" "windows-amd64") | default (dict) }}
   {{- $environment := .Values.environment | default "prod" }}
 
   # cpu:memory (1:4)

components/multi-platform-controller/staging-downstream/host-values.yaml

@@ -22,7 +22,7 @@ archDefaults:
     key-name: "konflux-stage-int-mab01"
     security-group-id: "sg-0482e8ccae008b240"
     subnet-id: "subnet-07597d1edafa2b9d3"
-  windows:
+  windows-amd64:
     ami: "ami-0cf643428c5013531"
     key-name: "konflux-stage-int-mab01"
     security-group-id: "sg-0482e8ccae008b240"