Fix AE in ExecutableResource

[danmoseley]

Description

Fixes #8732

We made the same 9.1->9.2 break in the Command property also but I think that should be maintained since Process.Start requires one (unless there's a Windows shell style verb, which we don't use)

I looked through the original change and found no other examples of empty string becoming disallowed beyond these two

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • No
    • Did you add <remarks /> and <code /> elements on your triple slash comments?
      • Yes
      • No
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
    • If yes, have you done a threat model and had a security review?
      • Yes
      • No
  • No
• Does the change require an update in our Aspire docs?
  • [] Yes
    • Is this introducing a breaking change?
      • Yes
        • Link to aspire-docs issue (please use this breaking-change template):
      • No
        • Link to aspire-docs issue (please use this doc-idea template):
  • No

[danmoseley]

/backport to release/9.2

[github-actions]

Started backporting to release/9.2: https://github.com/dotnet/aspire/actions/runs/14479796036

[danmoseley]

temporarily reverting the fix part to investigate test failure

[danmoseley]

Well wierd, back to original state and now it's all green. Must have been an issue in main...

[danmoseley]

/backport to release/9.2

[github-actions]

Started backporting to release/9.2: https://github.com/dotnet/aspire/actions/runs/14526388742

[danmoseley]

/backport to release/9.2

[github-actions]

Started backporting to release/9.2: https://github.com/dotnet/aspire/actions/runs/14526728317

[danmoseley]

Patched in 9.2.1. To pick up this fix if you need it,

For existing projects targeting 9.2.0, please update as follows;
<Sdk Name="Aspire.AppHost.Sdk" Version="9.2.0" /> to <Sdk Name="Aspire.AppHost.Sdk" Version="9.2.1" /> and
<PackageReference Include="Aspire...." Version="9.2.0" /> to <PackageReference Include="Aspire...." Version="9.2.1" /> and restore packages.

If you're creating new projects, you can just install and use the updated project templates: dotnet new install Aspire.ProjectTemplates::9.2.1 --force