Accept branchProtection args via branchRuleUpdate mutation

What does this MR do and why?

Accept branchProtection args via branchRuleUpdate mutation

Now we accept branchProtection arguments in the branchRuleUpdate mutation.

In CE these include:

branchRuleUpdate { branchProtection { allowForcePush: Boolean mergeAccessLevels [ access_level: Integer ] pushAccessLevels [ accessLevel: Integer deployKeyId: GlobalID ] } }

In EE we additionally allow:

branchRuleUpdate { branchProtection { codeOwnerApprovalRequired: Boolean mergeAccessLevels: [ { userId: GlobalID groupId: GlobalID } ] pushAccessLevels: [ { userId: GlobalID groupId: GlobalID } ] } }

Closes #441471 (closed)

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Before	After

How to set up and validate locally

You will need to find valid IDs from your GDK for this to work.

mutation {
  branchRuleUpdate(
    input: {
      id: "gid://gitlab/Projects::BranchRule/129",
      name: "master",
      branchProtection: {
        allowForcePush: true,
        codeOwnerApprovalRequired: true,
        mergeAccessLevels: [
          { accessLevel: 30 },
          { userId: "gid://gitlab/User/1" },
          { groupId: "gid://gitlab/Group/1" },
        ],
        pushAccessLevels: [
          { accessLevel: 30 },
          { userId: "gid://gitlab/User/1" },
          { groupId: "gid://gitlab/Group/1" },
          { deployKeyId: "gid://gitlab/DeployKey/1" }
        ]
      }
    }
  ) {
    branchRule {
      id
      name
      branchProtection {
        mergeAccessLevels {
          nodes {
            accessLevel
            accessLevelDescription
            user {
              id
            }
            group {
              id
            }
          }
        }
        pushAccessLevels {
          nodes {
            accessLevel
            accessLevelDescription
            user {
              id
            }
            group {
              id
            }
            deployKey {
              id
            }
          }
        }
        codeOwnerApprovalRequired
        allowForcePush
      }
    }
    errors
  }
}