Store rejected approval definitions in the issue properties under rejectedDefinitionIds.

This should complement definitionIds and approvedDefinitionIds to allow tracking of approvals that have been explicitly rejected.

Accepted criteria

• A new issue property rejectedDefinitionIds must be added.

• When an approval is rejected, its definition ID should be added to rejectedDefinitionIds.

• `rejectedDefinitionIds` should persist even if the approval is resubmitted.

• Remove an approval ID from `rejectedDefinitionIds` only when the approval is deleted and no longer available in the UI.

• Ensure rejectedDefinitionIds is an array that accumulates multiple rejected approvals.

• Maintain consistency with existing definitionIds and approvedDefinitionIds structures.