Add validation for permission name and file location

What does this MR do and why?

This MR adds validation for the permission name and definition file location. This is for the permission catalog that will be located in config/authz/permissions

This task is not enabled in CI pipelines. Permissions documentation will be updated when this validation is enforced in CI.

References

Screenshots or screen recordings

Before	After

How to set up and validate locally

Besides the specs, you can run validation with bundle exec rake gitlab:permissions:validate

This will likely result in some definition file errors. To force errors that this validation will check apply the following patch and run the task.

diff --git a/app/policies/project_policy.rb b/app/policies/project_policy.rb
index 42227d387583..752814fe0297 100644
--- a/app/policies/project_policy.rb
+++ b/app/policies/project_policy.rb
@@ -387,6 +387,7 @@ class ProjectPolicy < BasePolicy
     enable :read_note
     enable :create_project
     enable :create_issue
+    enable :create_issue_
     enable :create_note
     enable :upload_file
     enable :read_cycle_analytics
diff --git a/config/authz/permissions/issue/create.yml b/config/authz/permissions/issue/create.yml
index 480973b97665..578adfd113f9 100644
--- a/config/authz/permissions/issue/create.yml
+++ b/config/authz/permissions/issue/create.yml
@@ -1,4 +1,4 @@
-name: create_issue
+name: create_issue_
 description: Grants the ability to create issues
 scopes:
   - project
diff --git a/config/authz/permissions/issue/undefined.yml b/config/authz/permissions/issue/undefined.yml
new file mode 100644
index 000000000000..841f440c28ca
--- /dev/null
+++ b/config/authz/permissions/issue/undefined.yml
@@ -0,0 +1,5 @@
+name: undefined_issue
+description: unknown permission
+scopes:
+  - project
+feature_category: team_planning

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