[workloads] Use the dual signed wix version for workload msis

[lewing]

Fixes half of #59498

[dotnet-issue-labeler]

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Issue Details

---

Fixes half of #59498

Author:	lewing
Assignees:	-
Labels:	area-Infrastructure-mono
Milestone:	-

[lewing]

/backport to release/6.0-rc2

[github-actions]

Started backporting to release/6.0-rc2: https://github.com/dotnet/runtime/actions/runs/1263380417

[lewing]

runtime (Libraries Test Run checked coreclr Linux_musl arm64 Release)
https://helixre8s23ayyeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-59500-merge-a1559d53be114c048e/System.Text.RegularExpressions.Tests/1/console.f989b822.log?sv=2019-07-07&se=2021-10-13T15%3A29%3A34Z&sr=c&sp=rl&sig=NhwXNpBox%2FCbd66qPzy%2FLXrtg%2BxxH6RSLzt6wPWde8E%3D

  Starting:    System.Text.RegularExpressions.Tests (parallel test collections = on, max threads = 4)
    System.Text.RegularExpressions.Tests.RegexMatchTests.Match_ExcessPrefix(engine: SourceGenerated) [FAIL]
      Half-way through waiting for remote process.
      Timed out at 9/23/2021 3:35:31 PM after 60000ms waiting for remote process.
      	Process ID: 263
      	Handle: 1880
      	Name: dotnet
      	MainModule: /root/helix/work/correlation/dotnet
      	StartTime: 9/23/2021 3:34:31 PM
      	TotalProcessorTime: 00:01:03.0900000
      
      Stack Trace:
        /_/src/Microsoft.DotNet.RemoteExecutor/src/RemoteInvokeHandle.cs(224,0): at Microsoft.DotNet.RemoteExecutor.RemoteInvokeHandle.Dispose(Boolean disposing)
        /_/src/Microsoft.DotNet.RemoteExecutor/src/RemoteInvokeHandle.cs(57,0): at Microsoft.DotNet.RemoteExecutor.RemoteInvokeHandle.Dispose()
        /_/src/libraries/System.Text.RegularExpressions/tests/Regex.Match.Tests.cs(1095,0): 

[lewing]

@stephentoub several lanes here are failing due to the regex source generator tests. #59541

[ericstj]

@lewing did you want to add #60008 to this PR as well?

[lewing]

@lewing did you want to add #60008 to this PR as well?

done

[ericstj]

LGTM

[ericstj]

Tested this manually by pulling over changes from dotnet/arcade#8000 and confirmed it works as expected.