[12.0][ADD] hr_expense_advance_overdue_reminder

[Saran440]

This module, allow company to send overdue advance reminders to the employee.
it sends a reminder for an expense advance when it has past it's Due Date
An overdue reminder for a employee always include all the overdue advance an amount of that employee.

Filter expense advance is not clear
Way 1 : Find overdue expense advance from expense sheet

• Go to Expenses > Expense Reports > To Overdue
  

Way 2 : Filter overdue expense advance from wizard filter

• Go to Expenses > Employee Overdue > Overdue Reminder
  

After generated letters, it will keep it on Overdue Letters

The module supports a clever expense reimbursement reminder counter mechanism:

• the reminder counter is a property of an expense advance,
• the reminder counter of each overdue expense advance is incremented when sending a reminder by email. It is not incremented for reminders by phone.
• in an email template, you can configure at Settings > Technical > Email > Templates > Name 'Overdue Advance Reminder'

depend on OCA/credit-control#69
discuss with OCA/credit-control#87

[MeetKD]

Remove if not needed.

[github-actions]

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