Implement support for multi-user select fields within the issue user field step to enhance user selection flexibility. This update should include the capability for users to define how selected users are processed, offering options to either add them as individual approvers or to treat them as a collective group. For groups, introduce settings to specify the necessary vote count for approval or rejection and enable simultaneous voting features.

Accepted criteria

• Support for multi-user select fields is added to the issue user field step.
• Users can choose how to treat selected users: as individual approvers or as a group.
• Settings for groups to specify vote requirements for decisions are available.
• Simultaneous voting capability for group voting is implemented.