[Feature] Implement the CdmPoliciesApi

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What problem would this feature solve?

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Describe the solution you'd like:

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Any additional context or information:

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Are there any existing issues or pull requests related to this feature request?

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Before submitting this feature request, please make sure you have completed the following:

[ ] I have searched for similar feature requests in the repository's issue tracker.
[ ] I have checked the latest version of the Go SDK to see if this feature already exists.
[ ] I have provided a clear and descriptive title for this feature request.
[ ] I have provided a detailed description of the feature and its use case.
[ ] I have provided any relevant additional context or examples.
[ ] I have linked any related issues or pull requests.

Thank you for your contribution!

michaeldcanady / servicenow-sdk-go