Enforce granular role-based access control for stack version functions

Enforce granular role-based access control for stack version functions:

	Cluster User	Service Operator	Service Administrator	Cluster Operator	Cluster Administrator	Administrator
View stack version details
Manage stack versions
Edit stack repository URLs

Entry points affected:

• GET /api/v1/stacks/:stack_name/versions/:version_id
• GET /api/v1/stacks/:stack_name/versions/:version_id
• PUT /api/v1/stacks/:stack_name/versions/:version_id
• POST /api/v1/stacks/:stack_name/versions/:version_id
• DELETE /api/v1/stacks/:stack_name/versions/:version_id