Update kubeflow/pipelines manifests from 2.0.0-alpha.7

[surajkota]

Which issue is resolved by this Pull Request:
Resolves kubeflow/pipelines#8938

Steps to run the sync script for future reference:

1. Export the commit export COMMIT=2.0.0-alpha.7
2. Clone the pipelines repo locally and checkout the required commit

cd /tmp/
git clone https://github.com/kubeflow/pipelines.git kubeflow-pipelines
git checkout $COMMIT

1. cd to root of manifests repo
2. Run the sync script ./hack/sync-pipelines-manifests.sh
3. Create the PR from your fork

Its worth converting this to a github action in future in the meantime little documentation could save some developer time.

[DomFleischmann]

/lgtm

[kimwnasptd]

/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kimwnasptd, surajkota

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