Refactor Write-Host and Write-Warning usage

[tdabasinskas]

As discussed in #4, the following functions need to be updated, to get rid of Write-Host and Wriye-Warning (where it is used incorrectly):

* Approve-CertificateRequest
* Get-RequestRow
* Remove-CAKRACertificate
* Revoke-Certificate
* Remove-CertificateEnrollmentPolicyService
* Remove-CertificateEnrollmentService
* Remove-DatabaseRow
* Deny-CertificateRequest
* Add-CertificateEnrollmentService
* Add-CertificateEnrollmentPolicyService
* Add-CertificateTemplateAcl

Thank you.

[Crypt32]

Thanks for report. I will follow this list to improve error behavior in these commands.

[Crypt32]

The work is in progress in this branch: https://github.com/Crypt32/PSPKI/tree/feature-WriteHostCompliance