Disable tests on official build

[MiYanni]

Fixes: #9429

Summary

In the official pipeline, -integrationTest was specified. However, the build would run both integration tests and unit tests. It seems the easiest way was to specify /p:Test=false on these builds, which disabled running tests altogether.

Build Run

• No tests running: https://dnceng.visualstudio.com/internal/_build/results?buildId=2817954&view=results
• New run with review changes: https://dnceng.visualstudio.com/internal/_build/results?buildId=2818053&view=results

[joeloff]

The assumption being that tests ran during PR?

[MiYanni]

@joeloff Good call. I actually messed up where it looks like Windows is only run in official builds, while Linux and Mac are only ran for internal PR builds. Let me undo the changes for Linux/Mac. I don't know why it is designed that way, but it is what it is.

Edit: Oh wait. No, Windows is always ran and Linux/Mac are PR only. Okay, I gotta condition it then for Windows. I'll do that too.

[MiYanni]

Build succeeded. Merging.

[marcpopMSFT]

@backport to release/8.0.1xx

[marcpopMSFT]

We're still showing up on the dashboard I think from the servicing branches it looks like. requested copilot backport as the backport bot appears broken.