feat: migrate copy course to new api

[Alphajax]

🟢 Add deploy label if you want to deploy this Pull Request to staging environment

🧑‍⚖️ Pull Request Naming Convention

• Title should follow Conventional Commits
• Do not put issue id in title
• Do not put WIP in title. Use Draft PR functionality
• Consider to add area:* label(s)

• I followed naming convention rules

---

🤔 This is a ...

• New feature
• Bug fix
• Performance optimization
• Refactoring
• Test Case
• Documentation update
• Other

🔗 Related issue link(#2147)

Describe the source of requirement, like related issue link.

💡 Background and solution

Describe the big picture of your changes here
migrated copy course feature to new api
changed copyCourse request data to use v2 api
created copycourse controller at nest repository
reused copyFromTo(https://github.com/rolling-scopes/rsschool-app/blob/master/nestjs/src/courses/course-schedule/course-schedule.service.ts#L240) function

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Database migration is added or not needed
• Documentation is updated/provided or not needed
• Changes are tested locally

[valerydluski]

Could you also remove the old code?