[Dashboard] Keycloack terraform integration

[ThibaultBC]

Describe the Issue A clear and concise description of what you want to happen.

Additional Context Add any other context, attachments or screenshots

Acceptance Criteria

• [x] create clients (lambda + quicksights)
• [x] create role (reader/admin)
• [x] create identity provider
• [x] token management
• [x] Test

[prabhukiran9999]

https://github.com/bcgov/terraform-aws-quicksight-billing-dashboard-configuration/pull/1