[PLAT-15714] Adding prometheus scrape timeout and interval to k8s

Summary:
https://phorge.dev.yugabyte.com/D38836 only added the prometheus scrape timeout to YBA installer
deployments. This diff exposes both scrape timeout and scrape interval as values that user can
configure, which will then be reflected in prometheus.yml.

Test Plan: Deploy k8s and update scrapte timeout/interval

Reviewers: anijhawan, dshubin

Reviewed By: dshubin

Subscribers: amalyshev, yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D39020

stable/yugaware/templates/configs.yaml

@@ -424,8 +424,9 @@ metadata:
 data:
   prometheus.yml: |
     global:
-        scrape_interval:     10s
-        evaluation_interval: 10s
+        scrape_interval:     {{ .Values.prometheus.scrapeInterval }}
+        evaluation_interval: {{ .Values.prometheus.scrapeInterval }}
+        scrape_timeout:      {{ .Values.prometheus.scrapeTimeout }}
     rule_files:
       - '/opt/yugabyte/prometheus/rules/yugaware.ad.*.yml'
       - '/opt/yugabyte/prometheus/rules/yugaware.recording-rules.yml'

stable/yugaware/values.yaml

@@ -431,6 +431,8 @@ prometheus:
   queryConcurrency: 20
   queryMaxSamples: 5000000
   queryTimeout: 30s
+  scrapeTimeout: 10s
+  scrapeInterval: 10s
   ## Set this to false to disable scraping of Kubernetes worker
   ## nodes. Setting this to false will results in blank graphs of
   ## resource utilization for Kubernetes universes. Useful for