fix(ci): redesign log upload steps in build-x86-image workflow (#6361)

Consolidate duplicate ko-log upload steps, fix artifact name conflicts,
and ensure log collection covers install failures.

Changes:
- Merge two ko-log pairs (e2e-failure + restarts-failure) into one
  unified pair per job, reducing 230 lines of duplication
- Fix artifact name conflicts: all ko-log artifacts now include full
  matrix variables (e.g., ip-family, mode, ssl) to prevent collisions
- Expand events/audit-log/ko-log collection conditions to also trigger
  on install step failures, not just e2e failures
- Replace simple single-cluster ko-log with multi-cluster collection
  for IC conformance job

Bug fixes:
- Fix wrong step ID in kube-ovn-ipsec-e2e events collection
  (steps.ovn-ipsec-e2e -> steps.kube-ovn-ipsec-e2e)
- Fix wrong step ID in kube-ovn-ipsec-cert-mgr-e2e events collection
  (steps.ovn-ipsec-cert-mgr-e2e -> steps.kube-ovn-ipsec-cert-mgr-e2e)
- Fix typo in kube-ovn-ipsec-cert-mgr-e2e audit-log upload condition
  (steps.kube-ovn-ipse-cert-mgrc-e2e -> steps.kube-ovn-ipsec-cert-mgr-e2e)
- Fix wrong step ID in kube-ovn-connectivity-test upload condition
  (steps.kube-ovn-connectivity-e2e -> steps.e2e)
- Fix missing matrix variables in cilium-chaining-e2e first ko-log
  artifact name

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: oilbeater