chore: Tidy up Grafana dashboard #37291

Job	Run time
changes	14s
Build & cache Go code	3m 19s
Ensure Go modules synchronicity	22s
Build, test & lint UI code	1m 28s
Check changes to generated code	5m 7s
Lint Go code	3m 37s
Run end-to-end tests (v1.31.0, true)	51m 59s
Run unit tests with -race for Go packages	9m 41s
Run unit tests for Go packages	5m 43s
Run end-to-end tests (v1.30.4, false)	28m 32s
Run end-to-end tests (v1.29.8, false)	15m 33s
Run end-to-end tests (v1.28.13, false)	53m 56s
E2E Tests - Composite result	1s
Process & analyze test artifacts	0s
	2h 59m 32s

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