AUTH-6690 Add more fields for access application private destinations

[GreenStage]

Before launching this feature in GA, the team decided to split the URI field for private destinations in more fine-grained fields.
This decision was made after realizing that customers want more ways of defining private destinations that a single URI string can express.

Description

Has your change been tested?

I've pointed my local TF provider to my local cloudflare-go setup and tested manually against my staging account.

Screenshots (if appropriate):

Types of changes

What sort of change does your code introduce/modify?

• [ X ] New feature (non-breaking change which adds functionality)

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 v0.114.0.

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