Fix OnlyTake token redistribution order

[marko1olo]

Summary

• preserve command-line token order when ArgumentResult.OnlyTake passes tokens through multiple positional arguments
• redistribute passed-on tokens before each later argument's existing tokens, while respecting each argument's max arity
• add regression coverage for issue ArgumentResult.OnlyTake distribute not consumed tokens in unexpected way #2734 with six positional arguments and repeated OnlyTake(2) custom parsers

Fixes #2734.

Tests

• ./build.cmd -projects src\System.CommandLine.Tests\System.CommandLine.Tests.csproj
• .\.dotnet\dotnet.exe test src\System.CommandLine.Tests\System.CommandLine.Tests.csproj --framework net10.0 --filter "FullyQualifiedName~OnlyTake_preserves_token_order_when_multiple_arguments_pass_on_tokens"
• .\.dotnet\dotnet.exe test src\System.CommandLine.Tests\System.CommandLine.Tests.csproj --framework net10.0 --no-build --filter "FullyQualifiedName~OnlyTake"
• .\.dotnet\dotnet.exe test src\System.CommandLine.Tests\System.CommandLine.Tests.csproj --framework net10.0 --filter "FullyQualifiedName~CustomParsingTests"
• .\.dotnet\dotnet.exe test src\System.CommandLine.Tests\System.CommandLine.Tests.csproj --framework net10.0
• .\.dotnet\dotnet.exe test src\System.CommandLine.Tests\System.CommandLine.Tests.csproj --framework net472 --filter "FullyQualifiedName~OnlyTake"
• .\.dotnet\dotnet.exe test src\System.CommandLine.Tests\System.CommandLine.Tests.csproj --framework net472
• git diff --check

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Written by an agent (OpenAI Codex, GPT-5).