[yugabyte#8302] Platform: Scrape platform prometheus metrics in repli…

…cated

Summary: Added scrape config to scrape `/api/v1/prometheus_metrics` from platform.

Test Plan: Created custom prometheus config and searched for jvm stats.

Reviewers: sanketh, dskorobogaty, rtsisyk, daniel

Reviewed By: daniel

Subscribers: daniel, jenkins-bot, yugaware

Differential Revision: https://phabricator.dev.yugabyte.com/D11482

managed/devops/replicated.yml

@@ -107,10 +107,18 @@ components:
                       monitor: 'swamper'
               scrape_configs:
                 - job_name: 'prometheus'
-                  scrape_interval: {{repl ConfigOption "prometheus_scrape_interval"}}
                   scrape_timeout:  {{repl ConfigOption "prometheus_scrape_timeout"}}
                   static_configs:
                       - targets: ['{{repl HostPrivateIpAddress "prometheus" "prom/prometheus" }}:9090']
+
+                - job_name: 'platform'
+                  scrape_timeout:  {{repl ConfigOption "prometheus_scrape_timeout"}}
+                  metrics_path: "/api/v1/prometheus_metrics"
+                  static_configs:
+                    - targets: [
+                      '{{repl HostPrivateIpAddress "prometheus" "prom/prometheus" }}:9000'
+                    ]
+
                 - job_name: "node"
                   file_sd_configs:
                     - files: