Use Broker-specific Credentials for Solrcloud Broker

[nickumia-reisys]

User Story

In order to implement least-privilege on solrcloud broker, the Data.gov SSB team wants to create new keys for the solrcloud broker with the appropriate permissions.

Acceptance Criteria

[ACs should be clearly demoable/verifiable whenever possible. Try specifying them using BDD.]

• GIVEN [a contextual precondition]
  [AND optionally another precondition]
  WHEN [a triggering event] happens
  THEN [a verifiable outcome]
  [AND optionally another verifiable outcome]

Background

Historical Issues:

• [Tiny EPIC] Support SOLR standalone on ECS #3826

Security Considerations (required)

[Any security concerns that might be implicated in the change. "None" is OK, just be explicit here!]

Sketch

• Inspect the managed-boundry.tf of the datagov-ssb repo and review how the eks-broker is assigning keys + permissions
• Replicate for solrcloud-broker