Specify namespace for kserve web app configmap

[annajung]

Which issue is resolved by this Pull Request:
During the installation of v1.5.0-rc.1, noticed that kserve-models-web-app fails to start due to config error. Configmap needed for kserve web app is applied to default namespace instead of kserve namespace

Description of your changes:

• Specify namespace for kserve web app configmap

Checklist:

• Unit tests pass:
  Make sure you have installed kustomize == 3.2.1
  1. make generate-changed-only
  2. make test

[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: annajung
To complete the pull request process, please assign yuzisun after the PR has been reviewed.
You can assign the PR to them by writing /assign @yuzisun in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• contrib/kserve/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[surajkota]

#2146

[kimwnasptd]

Thanks for the PR Anna! Could you instead make it to the app's repo? https://github.com/kserve/models-web-app

You can make the PR directly to the release-0.7 branch, and I'll cherry-pick it later on to master.

I also want to include kserve/models-web-app#32, so we can include everything with one PR in the manifests

[annajung]

@kimwnasptd it's been moved to kserve repo! kserve/models-web-app#33

Will close out the PR as the changes have been moved to kserve repo as recommended by #2151 (comment)