readOnly and writeOnly support v2

[radzserg]

validate requires a new context parameter, that will define validation context - input or output. Based on the context either readOnly or writeOnly parameters will be removed from the required list.

Addresses #1142

Summary

Replace this with something that explains what this PR is for and why it matters.

Checklist

• The basics
  • I tested these changes manually in my local or dev environment
• Tests
  • Added or updated
  • N/A
• Event Tracking
  • I added event tracking and followed the event tracking guidelines
  • N/A
• Error Reporting
  • I reported errors and followed the error reporting guidelines
  • N/A

Additional context

Read-Only and Write-Only Properties
If a readOnly or writeOnly property is included in the required list, required affects just the relevant scope – responses only or requests only. That is, read-only required properties apply to responses only, and write-only required properties – to requests only.

This PR based on @marcelltoth PR #1619 It's quite old, and it was quite difficult to resolve merge conflicts.

I also made Context a required parameter and removed none option. Since we always have either input or output context.

[marcelltoth]

Wow, I barely even remember that PR, it was among the first things I've done here. 😄 Thanks for bringing it back to life! 🙌 😍

[chohmann]

Didn't get to spend as much time reviewing this today as I thought, but this looks good!