Andrii ChubatiukandGitHub fc56d7aabc docs: update grafana plugin links, move root file to plugins repo (#10001) ...

### Describe Your Changes

update victorialogs grafana plugin links, moved root plugin file to
plugin repo

### Checklist

The following checks are **mandatory**:

- [ ] My change adheres to [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/victoriametrics/contributing/#pull-request-checklist).
- [ ] My change adheres to [VictoriaMetrics development
goals](https://docs.victoriametrics.com/victoriametrics/goals/).

2025-11-13 15:00:14 +02:00

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