Incorrect value from CasC

[kott-off]

Describe the bug
Datadog plugin is configured with CasC. ciInstanceName value from CasC will not be applied properly to "CI Instance Name" setting in UI, it gets value from traceServiceName .

To Reproduce
Steps to reproduce the behavior:

1. Setup Datadog plugin in CasC

 datadogGlobalConfiguration:
    cacheBuildRuns: true
    ciInstanceName: "playground-dev.dev"
    collectBuildLogs: false
    collectBuildTraces: false
    datadogClientConfiguration:
      datadogApiConfiguration:
        apiKey:
          datadogCredentialsApiKey:
            credentialsId: "datadog_api_key"
        intake:
          datadogIntakeUrls:
            apiUrl: "https://api.datadoghq.com/api/"
            logsUrl: "https://http-intake.logs.datadoghq.com/v1/input/"
            webhooksUrl: "https://webhook-intake.datadoghq.com/api/v2/webhook/"
    emitConfigChangeEvents: false
    emitSecurityEvents: true
    emitSystemEvents: true
    enableCiVisibility: true
    hostname: "playground-dev.dev"
    refreshDogstatsdClient: false
    reportWith: "HTTP"
    showDatadogLinks: true
    targetApiURL: "https://api.datadoghq.com/api/"
    targetCredentialsApiKey: "datadog_api_key"
    targetLogIntakeURL: "https://http-intake.logs.datadoghq.com/v1/input/"
    targetWebhookIntakeURL: "https://webhook-intake.datadoghq.com/api/v2/webhook/"
    traceServiceName: "jenkins"
    useAwsInstanceHostname: false

2. Apply config
3. Go to global configuration
4. See that "CI Instance Name" setting is different from CasC ciInstanceName

Environment and Versions:
CasC plugin: 1953.v148f87d74b_1e
datadog plugin: 9.1.5
Jenkins LTS: 2.492.3