Show status of all the services used in backend

[mesudip]

In health-check api of backend, include

• db connection status
• kafka connection status
• dbsync-api connection status

In manager

• the status should have information 'secs since last block'
• database connection status
• dbsync-api connection status
• kuber api connection status
• metadata (save ) api
• metadata (fetch) api

[Sital999]

It has been changed and ready for deployment to status page

[Sital999]

It has been updated and deployed to AAT status page