chore: update agent config with cluster name

[luohoufu]

What does this PR do

This pull request includes several changes to support the addition of a new cluster_name label in the configuration and API code. The most important changes include updates to the task_config_tpl.dat file and modifications to the getAgentIngestConfigs function in remote_config.go.

Configuration Updates:

• config/setup/common/data/task_config_tpl.dat: Added cluster_name label to the configuration template to ensure the cluster name is included in the task configuration. [1] [2]

API Code Updates:

• modules/agent/api/remote_config.go: Added clusterName variable and included it in the configuration string to pass the cluster name through the API. [1] [2] [3]

Rationale for this change

Standards checklist

• The PR title is descriptive
• The commit messages are semantic
• Necessary tests are added
• Updated the release notes
• Necessary documents have been added if this is a new feature
• Performance tests checked, no obvious performance degradation