Adding Access client secret and ID to device posture integration

[kjhandy]

Adding the access_client_secret and access_client_id fields for device posture integrations.

Description

These are new credentials that an admin can supply for their posture integration.

Has your change been tested?

Yes, added a unit test here and manually tested. These fields have been available in the API and ZT dashboard for the past week.

Types of changes

What sort of change does your code introduce/modify?

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• This change is using publicly documented in cloudflare/api-schemas
  and relies on stable APIs.

[github-actions]

changelog detected ✅

[github-actions]

This functionality has been released in v0.84.0.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!