Bugfix: grafana dashboard

[hlts2]

Description:

WHAT

I have fixed invalid character error for grafana dashbaord

WHY

When I deployed grafana, all dashboards were not visible due to invalid key errors

grafana-855cbdc6d5-4h7rz grafana logger=provisioning.dashboard type=file name=dashboards-vald t=2022-12-19T11:09:11.329654054Z level=error msg="failed to load dashboard from " file=/var/lib/grafana/dashboards-vald/02/vald-discoverer.json error="invalid character '\"' after object key:value pair"

Related Issue:

Versions:

• Go Version: 1.19.4
• Docker Version: 20.10.8
• Kubernetes Version: 1.22.0
• NGT Version: 1.14.8

Checklist:

• I have read the CONTRIBUTING document and completed our CLA agreement.
• I have checked open Pull Requests for the similar feature or fixes?

Special notes for your reviewer:

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[hlts2]

📝 I think I have solved this problem because dashboars were displayed.

[kpango]

I think we should add deployment test for grafana configuration on the ci.

[hlts2]

Thank you for your suggestion.
I have investigated and I think we can use the following OSS project.

https://github.com/grafana/dashboard-linter