Is your feature request related to a problem? Please describe.
As our embedding user base grows, new scenarios appear. This feature is meant to make it easier for our customers to set up multi-tenant environments, as a fine-grained permission system for inside collections can provide tools for customers to seel different plans/packages/etc to their customers.

Describe the solution you'd like
Ability to set more granular permissions inside collections for each group/user. By granular I mean the ability to give permission to create or delete dashboards, and create/delete collections inside a specific collection. This will let admins combine more granular permissions for their groups.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

How important is this feature to you?
Requested by a customer with a multi-tenant environment

Additional context
Related to #36932 and #16100