ci: include run-hash prefix in ingress host for non-PR triggers

The hostname previously omitted the GITHUB_WORKFLOW_JOB_ID prefix for
merge_group and scheduled runs (the gate required pull_request.number),
while the namespace always included it. Back-to-back runs sharing a
scenario+chart-version slug then collided on the shared host while their
namespaces didn't, and Playwright hit a prior run's pods. Surfaced as
esa0 auth0-smoke client_id mismatches where Expected was this run's
freshly-minted Auth0 IDs and Received was an earlier run's IDs.

Drop the is_pr gate so the prefix is applied whenever deployment-ttl is
empty, matching the namespace logic above.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: eamonnmoloney

.github/actions/workflow-vars/action.yaml

@@ -181,7 +181,7 @@ runs:
       export INGRESS_HOSTNAME_BASE="${INFRA_INGRESS_HOSTNAME_BASE}"
 
       TEST_INGRESS_HOST="${TEST_IDENTIFIER}.${INGRESS_HOSTNAME_BASE}"
-      if [[ "${{ inputs.deployment-ttl }}" == "" ]] && is_pr; then
+      if [[ "${{ inputs.deployment-ttl }}" == "" ]]; then
         TEST_INGRESS_HOST="${GITHUB_WORKFLOW_JOB_ID}-${TEST_INGRESS_HOST}"
       fi
       # The var is needed in some non-shell steps.