Move to latest version of System.CommandLine package

[CurtHagenlocher]

What's Changed

Moves integration tests to the latest version of the System.CommandLine package. Also cleans up some small preexisting formatting issues which the linter caught this time even though they were present before.

Closes apache/arrow-go#3.

[Copilot]

Pull Request Overview

This PR updates the System.CommandLine package to the latest version and refactors the command-line interface code to use the newer API patterns. The changes migrate from the beta versions to a release candidate version and update the code to match the new API structure.

• Updates System.CommandLine package from beta versions to 2.0.0-rc.1.25451.107
• Refactors command-line option declarations to use object initializer syntax
• Migrates from CommandHandler.Create to manual parsing with ParseResult.GetValue

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
test/Apache.Arrow.IntegrationTest/Program.cs	Updates command-line parsing to use new API with explicit option declarations and manual parsing
test/Apache.Arrow.IntegrationTest/Apache.Arrow.IntegrationTest.csproj	Updates System.CommandLine package version from beta1 to rc.1
test/Apache.Arrow.Flight.IntegrationTest/Program.cs	Migrates from SetHandler to SetAction and updates command structure for new API
test/Apache.Arrow.Flight.IntegrationTest/Apache.Arrow.Flight.IntegrationTest.csproj	Updates System.CommandLine package version from beta4 to rc.1

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[CurtHagenlocher]

@kou, I think the integration tests are failing for infrastructure reasons rather than as a result of this change -- especially because this failure model looks familiar -- but I'm not sure.

[kou]

I opened apache/arrow#47673 for it.

[CurtHagenlocher]

I opened apache/arrow#47673 for it.

Thanks; it looks like this is impacting all test runs so I'm going to go ahead and commit this PR as I don't believe it to be related.