Change Windows arm32/arm64 Debug normal/innerloop jobs to NOT run tests

Change Windows arm32/arm64 Debug normal/innerloop jobs to NOT run tests

We don't want these Debug jobs to run tests, because Debug testing is
slow, and we have few machine resources. It's a bit of a bug that we
are currently running tests, because the job is named with "Build", not
"Build and Test".

So make it do what the name says: Debug normal/innerloop arm32/arm64 jobs
will not run tests.

This is asymmetric, unfortunately. I might prefer that the Debug jobs get
generated as "Build and Test", but just not be triggered. (But be available
for triggering.) Or perhaps just not get generated. That might require a
separate set of just "Build" jobs that could be useful in some scenarios,
such as for what the current Debug "Build" only jobs are currently used for.

Commit migrated from https://github.com/dotnet/coreclr/commit/6ca477caa0e55c3ed722f991d10933ba4409fcdc