[ci] Fix sign and build workloads dnceng

[rmarinho]

Description

Changes to be able to build the workloads and .zip file for vs insertion on the new dnceng.

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

9.0.10 SR1

Is this a regression from previous behavior?

No, this is something new

Last version that worked well

No response

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output