[Monitoring] Replace all the Angular directives with React components

[tsullivan]

These <monitoring-cluster-xyz-status> Angular directives can be rewritten to use React components instead of Angular HTML. That way when the view gets rewritten to use React, the status bar component will already be in the code and ready to go in.

> public/views/kibana/overview/index.html:6:23:  <monitoring-cluster-status-kibana status="pageData.clusterStatus"></monitoring-cluster-status-kibana>
  public/views/kibana/instances/index.html:6:23:  <monitoring-cluster-status-kibana status="kibanas.data.clusterStatus"></monitoring-cluster-status-kibana>
  public/views/logstash/overview/index.html:2:23:  <monitoring-cluster-status-logstash status="pageData.clusterStatus"></monitoring-cluster-status-logstash>
  public/views/logstash/nodes/index.html:2:23:  <monitoring-cluster-status-logstash status="lsNodes.data.clusterStatus"></monitoring-cluster-status-logstash>
  public/views/logstash/pipelines/index.html:6:23:  <monitoring-cluster-status-logstash status="pageData.clusterStatus"></monitoring-cluster-status-logstash>
  public/views/elasticsearch/ml_jobs/index.html:2:23:  <monitoring-cluster-status-elasticsearch status="mlJobs.data.clusterStatus"></monitoring-cluster-status-elasticsearch>

[tsullivan]

Broken into multiple PRs:

• Improve functional tests' test subject selectors: [Monitoring] Summary Status component data-test-subject wrap entire label/value container #19289
• Elasticsearch directives: [Monitoring] use react components for Elasticsearch directives #19362
• Kibana directives - [Monitoring] use react components for Kibana directives #19379
• Logstash directives - [Monitoring/React] Logstash cluster status bars in react #19433
• Add unit test for status bar component, remove status icon angular directive: Monitoring Angular directives to use React components #19183