drop west europe do to re-occuring capacity issues

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

capz/run-capz-e2e.sh

@@ -477,8 +477,8 @@ set_azure_envs() {
     # Generate SSH key.
     capz::util::generate_ssh_key
 
-    export AZURE_LOCATION="${AZURE_LOCATION:-$(capz::util::get_random_region)}"
-
+    AZURE_LOCATION=$(get_random_region)
+    export AZURE_LOCATION
     if [[ "${CI:-}" == "true" ]]; then
         # we don't provide an ssh key in ci so it is created.  
         # the ssh code in the logger and gmsa configuration
@@ -496,6 +496,12 @@ log() {
 	echo "$(date -R): $msg"
 }
 
+# all test regions must support AvailabilityZones
+get_random_region() {
+    local REGIONS=("canadacentral" "eastus" "eastus2" "northeurope" "uksouth" "westus2" "westus3")
+    echo "${REGIONS[${RANDOM} % ${#REGIONS[@]}]}"
+}
+
 set_ci_version() {
     # select correct windows version for tests
     if [[ "$(capz::util::should_build_kubernetes)" == "true" ]]; then