Protected containers: Provide CRUD operations ContainerRegistryProtectionRules in GraphQL API

Context

• As part of the epic &9825 , project maintainer or owner need to have a way to define the ContainerRegistry::Protection::Rule
• There are different ways to realize this => however, we decided to start by offering a GraphQL API interface
• This GraphQL interface is minimal should allow basic manipulation of the defined container protection rules

🛠 with ❤ at Siemens

Proposal

• Authorization: ContainerRegistry::Protection::Rule can only changed by project maintainer or higher => consider implementation with declarative framework

GraphQL Operations	MR
Mutation: Create new container registry protection rule	Protected containers: Graphql mutation for crea... (!133527 - merged)
Mutation: Delete existing container registry protection rule	Protected containers: Add graphql mutation to d... (!137176 - merged)
Query: All container registry protection rules (incl. pagination)	Protected packages: GraphQL api for querying pa... (!127022 - merged)
Mutation: Update existing container registry protection rule	Protected containers: Graphql mutation update c... (!137175 - merged)

Checklist

• Create MRs for each endpoint