otlp processor transform rename metric not work

[chenfango]

Description: rename metric Not in effect， What's the problem?

Config
otelcol.processor.transform "app_attr" {
error_mode = "ignore"
metric_statements {
context = "datapoint"
statements = [
set(attributes["collector"], "grafana-alloy") where attributes["collector"] == nil,
]
}

    metric_statements {
      context = "metric"
      statements = [
        `set(name, "azure_successe2elatency_alloy") where name == "azure_successe2elatency_count"`,
      ]
    }

[chenfango]

  otelcol.processor.transform "app_attr" {
    error_mode = "ignore"
    metric_statements {
      context = "datapoint"
      statements = [
        `set(attributes["collector"], "grafana-alloy") where attributes["collector"] == nil`,
      ]
    }

    metric_statements {
      context = "metric"
      statements = [
        `set(name, "azure_successe2elatency_alloy") where name == "azure_successe2elatency_count"`,
      ]
    }