Add API Example for CCDL Portal-wide Datasets

[avrohomgottlieb]

Issue Number

Closes #1855.

Purpose/Implementation Notes

This PR adds a new file to our api example catalogue, addressing the case of CCDL Portal-wide Datasets.

Types of changes

What types of changes does your code introduce?

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

Functional tests

N/A

Checklist

• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

Screenshots

N/A