feat: Update scope of OSPR Liaison role.

• Delete current scope (which has become obsolete).
• Add new scope (which had been approved previously in the context of this mini discovery).
• Reassign role.

Testing

• Check rendered version of changes for formatting issues:
  • Role definition
  • Role assignments

Tickets

• BB-10372

Reviewers

• @samuelallan
• @gabrieldamours