[release/9.0.3xx] make container app/entrypoint argument defaults only happen on the RID-specific builds, not the outer RID-less build

[baronfel]

Manual backport of #47424 to release/9.0.3xx due to code changes across the branches.

[Copilot]

Pull Request Overview

This PR backports changes from #47424 to ensure that container app/entrypoint argument defaults are applied only on the RID-specific builds and not on the outer RID-less build.

• Adds a new public readonly string for container execution arguments in KnownStrings.cs.
• Updates integration tests in TargetsTests.cs to reference the new property instead of the old one.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/Containers/Microsoft.NET.Build.Containers/KnownStrings.cs	Added a new property for container execution arguments.
test/Microsoft.NET.Build.Containers.IntegrationTests/TargetsTests.cs	Updated test build targets to use the new container execution args property.

Comments suppressed due to low confidence (1)

src/Containers/Microsoft.NET.Build.Containers/KnownStrings.cs:30

• [nitpick] Consider renaming _ComputeContainerExecutionArgs to ComputeContainerExecutionArgs to better align with .NET public member naming conventions.

public static readonly string _ComputeContainerExecutionArgs = nameof(_ComputeContainerExecutionArgs);

[baronfel]

/azp run sdk-unified-build

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).