Infra metrics api updation

[Sarathsgck12]

• Why?

1. Current grafana plugin uses the old APIs used in querying infrastructure metrics . We need to replace the old APIs with the new ones.
2. Infrastructure Analyze in Grafana Plugin does not have a groupBy or metric field.

• What?

  The old APIs used in querying infrastructure metrics are replaced with the new APIs

  1. New metrics API Implementation - The API /api/metrics Replaced with api/infrastructure-monitoring/metrics
  2. New snapshot API Implementation - The API /api/snapshots/${snapshotId} Replaced with api/infrastructure- monitoring/snapshots
  3. New snapshot Type API Implementation - The API /api/snapshots/types Replaced with /api/infrastructure- monitoring/analyze/entity-types
  4. New analyse API Implementation - Renaming Infrastructure Explore to Infrastructure Analyze . The API /api/infrastructure-monitoring/explore/groups Replaced with /api/infrastructure- monitoring/analyze/entity-groups
  5. New context API Implementation - The API /api/snapshots/context Replaced with /api/infrastructure-monitoring/snapshots?plugin=*&size=<value>&query=<query>

  Added Filter fields (groupBy and metric) in Infrastructure Analyze session for avoiding manual filtering

• link to cards: https://instana.kanbanize.com/ctrl_board/206/cards/135673/details/

[ChinmayGitHub]

LGTM

[sophiaxu0424]

There's a problem with ui-backend-mockserver, which failed to be up in the yarn start command, this should be fixed before merging.