FIX - Update metadata envoy service name in mlpipelines-ui deployment file

[VaniHaripriya]

The issue resolved by this Pull Request:

Resolves RHOAIENG-5348

Description of your changes:

• Updated mlpipelines-ui deployment file with the updated metadata-envoy service host .
• Updated metadata-envoy-serviceaccount with the new service name.

Testing instructions

Created this PR to fix the below error in kfp-ui which was caused by the changes done with this PR-#650

Error occurred while trying to proxy request /ml_metadata.MetadataStoreService/GetContextByTypeAndName from ds-pipeline-ui-sample-dspa1.apps.rosa.hukhan.wrh7.p3.openshiftapps.com to http://ds-pipeline-metadata-envoy-sample:9090/ (ENOTFOUND) (https://nodejs.org/api/errors.html#errors_common_system_errors)

Deploy DSPO and create a DSPA instance. Create a pipeline run and make sure there are no errors in the UI and should be able to see the pipeline status.

Checklist

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[dsp-developers]

A new image has been built to help with testing out this PR: quay.io/opendatahub/data-science-pipelines-operator:pr-653
An OCP cluster where you are logged in as cluster admin is required.

To use this image run the following:

cd $(mktemp -d)
git clone git@github.com:opendatahub-io/data-science-pipelines-operator.git
cd data-science-pipelines-operator/
git fetch origin pull/653/head
git checkout -b pullrequest 819a6b93b818569cf1f75ac07db4e2af48f13ea6
oc new-project opendatahub
make deploy IMG="quay.io/opendatahub/data-science-pipelines-operator:pr-653"

More instructions here on how to deploy and test a Data Science Pipelines Application.

[dsp-developers]

Change to PR detected. A new PR build was completed.
A new image has been built to help with testing out this PR: quay.io/opendatahub/data-science-pipelines-operator:pr-653

[gmfrasca]

/lgtm

[hbelmiro]

/approve

Deployed and ran a pipeline successfully.

[HumairAK]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hbelmiro, HumairAK

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