[monitor-server] fix: chage anonymous

[mengchengTang]

What does this PR do?

chage anonymous- #158

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[tardis-key]

This was introduced in PR #144. It is related to the repeat feature of the agent dashboard—please confirm @Hailey-Zh

[tardis-key]

This issue is officially documented by Grafana:

• Bug report: #123495 — “New Tab/Row level variables do not show with anonymous access”
• Official fix: #125078 — “fix: Enable anonymous users to use section variables”
  • Milestone: 13.1.x

The fix is included in Grafana v13.1.0, but not in v13.0.1. RL-Insight currently installs Grafana 13.0.0. Therefore, enabling anonymous access breaks section-level variables and the Agent Loop nested Repeat dashboard for anonymous users.