Fix grafana container restart policy (#8577)

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### Motivation and context
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Fixes #8576 

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I've tried it on my CVAT installation and it works.


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<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

- **New Features**
- Introduced a new service, `cvat_grafana`, for enhanced Grafana
container management.
- Configured automatic restart and integrated with ClickHouse
environment settings.
	- Added authentication options and plugin installations for Grafana.
	- Custom entrypoint script for setup of data sources and dashboards.

- **Bug Fixes**
- Resolved issues with the Grafana container restart policy to ensure
proper management.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

changelog.d/20241022_114627_gui-u.md

@@ -0,0 +1,4 @@
+### Fixed
+
+- Fix Grafana container restart policy
+  (<https://github.com/cvat-ai/cvat/pull/8577>)

docker-compose.yml

@@ -329,6 +329,7 @@ services:
 
   cvat_grafana:
     image: grafana/grafana-oss:10.1.2
+    restart: always
     container_name: cvat_grafana
     environment:
       <<: *clickhouse-env