[Meta] Migrate in D10

Problem/Motivation

Make a plan of migrate priorities for D10 which is scheduled for release in December 2022.

Proposed resolution

High priority

• 📌 Tasks to deprecate Migrate Drupal Postponed
• 📌 Create a way to declare a plugin as deprecated Needs work
• 📌 Move source_module and destination_module from Migrate to Migrate Drupal Needs work

Deprecations

• 📌 [PP-1] Deprecate Migration::set() Postponed
• 📌 $migration_dependencies has inconsistent structure Fixed
• #3246666: Deprecate migrate_lookup and replace with cleaner process plugin →

#3272352: Add a UI for deleting temporary permissions →

Medium priority

• 📌 Move memory management from MigrateExecutable to an event subscriber Needs review

Needing a deprecation, Priority to be decided

• 📌 Remove SourcePluginBase::$mapRowAdded Closed: duplicate
• #3200797: [PP-1] Deprecate d6_user_picture migrate source plugin →
• #3188670: Deprecate MigrateIdMapInterface::prepareUpdate() →
• 📌 Deprecate MigrateSkipProcessException Fixed
• 📌 [PP-1] Deprecate classic node migration plugin in Drupal 9 for removal in Drupal 10 Postponed
• #3247756: [PP-2] Deprecate MigrateSkipRowException and schedule its removal →
• #3308772: Deprecate Migrate Drupal EmptySource source plugin →
• #2937177: [PP-1] Migrate plugin base classes should implement ConfigurablePluginInterface →
• #3209220: Deprecate and remove action settings migration →
• #3004510: Migrations should use plugin collections for source, destination, and ID map →

Completed

#3198608: trackLastImported YAML key to enable tracking the last import date of a row is undocumented and confusing. →