Update Grafana User dashboard

[davidmirror-ops]

Closes #5670

Why are the changes needed?

As a user, I want to install the Flyte-provided Grafana dashboards and get metrics

What changes were proposed in this pull request?

How was this patch tested?

Setup process

Screenshots

Check all the applicable boxes

• [ ] I updated the documentation accordingly.
• [ ] All new and existing tests passed.
• [ ] All commits are signed-off.

Related PRs

Docs link