Crash detection in build script is off-by-one

[Foda]

Description

While looking at why the test crashing still allowed the test run to pass I noticed that we do actually check to see if the number of test categories matches:
Enable WinUI Controls Test Pipeline by PureWeen · Pull Request #17221 · dotnet/maui (github.com)

I made a debug build that prints out all the categories (Pipelines - Run 8.0.6-ci.net8.27224+pr.19697-sha.8a651754ae-azdo.104578 logs (azure.com)) which is 43 items, but the artifacts produced a build with only 42 xml files (it's missing TestResults-com_microsoft_maui_controls_devicetests_Frame.xml). You can also see it's missing from the test results page in ADO too (Pipelines - Run 8.0.6-ci.net8.27224+pr.19697-sha.8a651754ae-azdo.104578 (azure.com))

Here's frame test showing up in a non-crashed build: Pipelines - Run 8.0.6-ci.net8.27199+pr.19682-sha.957f043dce-azdo.104513 (azure.com)

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

8.0.3

Is this a regression from previous behavior?

No, this is something new

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

No response