Make register job service to be resillient

What does this MR do?

Make scheduler to be resilient to data integrity issues: https://gitlab.com/gitlab-org/gitlab/issues/34897.

This prevents the problem as https://gitlab.com/gitlab-com/gl-infra/infrastructure/issues/8262 https://gitlab.com/gitlab-org/gitlab/issues/34897.

The scheduler failure is considered retry able, and by default it is retried 2 extra times.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

app/models/ci/build.rb

@@ -36,7 +36,7 @@ class Build < CommitStatus
     }.freeze
 
     DEFAULT_RETRIES = {
-      scheduler_failure: 2
+      "scheduler_failure" => 2
     }.freeze
 
     has_one :deployment, as: :deployable, class_name: 'Deployment'
@@ -398,7 +398,7 @@ def retry_failure?
         max_retries_for_reason(failure_reason.to_s) ||
         0
 
-      retries_max > 0 && retries_count < retries_max
+      max_allowed_retries > 0 && retries_count < max_allowed_retries
     end
 
     def latest?