chore: remove AnyDuringMigration from the insertion marker manager (#6398)
chore: remove AnyDuringMigration from the insertion marker manager (#6398)

* chore: remove AnyDuringMigration from the insertion marker manager

* chore: fix final issues

* chore: format
rachel-fenichel/blockly,google/blockly,google/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,google/blockly,google/blockly,rachel-fenichel/blockly,google/blockly,google/blockly,rachel-fenichel/blockly,google/blockly,rachel-fenichel/blockly