Test fails with Error: error getting addon template: template not found: webapp_routing

[sjwaight]

Running this command:

./draft --dry-run --dry-run-file test/temp/update_dry_run.json update -d ./langtest/ -a webapp_routing --variable ingress-tls-cert-keyvault-uri=test.cert.keyvault.uri --variable ingress-use-osm-mtls=true --variable ingress-host=host1

results in:

Error: error getting addon template: template not found: webapp_routing