[Automated] Update backstage-plugins-eventing nightly

[knative-automation]

/assign @knative-extensions/backstage-plugins-writers
/cc @knative-extensions/backstage-plugins-writers

Produced via:

for x in eventing-crds.yaml eventing-core.yaml in-memory-channel.yaml mt-channel-broker.yaml; do
  curl https://storage.googleapis.com/knative-nightly/eventing/latest/$x > ${GITHUB_WORKSPACE}/./third_party/eventing-latest/$x
done

Details:

bumping knative.dev/eventing 5828b49...e70d08b:
  > e70d08b [main] Upgrade to latest dependencies (# 8752)
  > 3f59df1 feat: Supporting using pod default credentials for Integration Source and Sink (# 8731)
  > 9fe13ee  chore: update otel semconv version (# 8753)
  > 8f709d0 [main] Upgrade to latest dependencies (# 8751)

[knative-prow]

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