feat: remove the exempt-all-milestones option

BREAKING CHANGE:
The option exempt-all-milestones was removed

__tests__/constants/default-processor-options.ts

@@ -35,9 +35,8 @@ export const DefaultProcessorOptions: IIssuesProcessorOptions = Object.freeze({
   exemptMilestones: '',
   exemptIssueMilestones: '',
   exemptPrMilestones: '',
-  exemptAllMilestones: false,
-  exemptAllIssueMilestones: undefined,
-  exemptAllPrMilestones: undefined,
+  exemptAllIssueMilestones: false,
+  exemptAllPrMilestones: false,
   exemptAssignees: '',
   exemptIssueAssignees: '',
   exemptPrAssignees: '',