Is TDM supported in any cloud platform?
Test Data ManagerTDM
As long as all ports are open and in the same network and communicate with TDM server and Database, it should be fine to have TDM in the cloud.
System Requirements (broadcom.com)
Supported Data Sources (broadcom.com)
ARD 3.0 installation documentation is available at https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/continuous-testing/agile-requirements-designer/3-0/installing.html
Also, don't need a new license for TDM and ARD 3.0. If ARD versions is before 3.0 then a new license is required.