Add LoongArch64 support

[stdmnpkg]

Description

add loongarch64 to architecture enums, which is supported by .NET >=9

Related issue

• I have ensured that there is a previously discussed and approved issue.

[nohwnd]

lgtm please fix the formatting so it can build.

[stdmnpkg]

@microsoft-github-policy-service agree

[nohwnd]

Which hardware has that architecture and were you able to run it on that?

(closed runtime issue dotnet/runtime#59561)

[stdmnpkg]

yes, CI generated package works on my loongarch64 desktop machine.

(ssh)studentmain@a-loong-loooooong-ago [ dotnet_demo ] $ cat Test1.cs
namespace dotnet_demo;

[TestClass]
public sealed class Test1
{
    [TestMethod]
    public void TestMethod1()
    {
    }
}
(ssh)studentmain@a-loong-loooooong-ago [ dotnet_demo ] $ cat dotnet_demo.csproj
<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net10.0</TargetFramework>
    <LangVersion>latest</LangVersion>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>
    <Using Include="Microsoft.VisualStudio.TestTools.UnitTesting" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.TestPlatform" Version="18.4.0-ci" />
    <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="18.4.0-ci" />
    <PackageReference Include="MSTest" Version="4.0.2" />
  </ItemGroup>

</Project>
(ssh)studentmain@a-loong-loooooong-ago [ dotnet_demo ] $ dotnet --list-sdks
10.0.100 [/usr/lib/dotnet/sdk]
(ssh)studentmain@a-loong-loooooong-ago [ dotnet_demo ] $ dotnet --list-runtimes
Microsoft.AspNetCore.App 10.0.0 [/usr/lib/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 10.0.0 [/usr/lib/dotnet/shared/Microsoft.NETCore.App]
(ssh)studentmain@a-loong-loooooong-ago [ dotnet_demo ] $ dotnet test
还原完成(0.6)
  dotnet_demo net10.0 已成功 (0.3 秒) → bin/Debug/net10.0/dotnet_demo.dll
  dotnet_demo 测试 net10.0 已成功 (1.4 秒)

测试摘要: 总计: 1, 失败: 0, 成功: 1, 已跳过: 0, 持续时间: 1.4 秒
在 3.1 秒内生成 已成功
(ssh)studentmain@a-loong-loooooong-ago [ dotnet_demo ] $ fastfetch
                __                          studentmain@a-loong-loooooong-ago
             gpBBBBBBBBBP                   ---------------------------------
         _gBBBBBBBBBRP                      OS: AOSC OS (13.0.4) loongarch64
       4BBBBBBBBRP  ,_____                  Host: Loongson-3A6000-HV-7A2000-XA61200
            `"" _g@@@@@@@@@@@@@%g>          Kernel: Linux 6.17.7-aosc-main-16k
            __@@@@@@@@@@@@@@@@P"  ___       Uptime: 14 days, 1 hour, 6 mins
         _g@@@@@@@@@@@@@@@N"` _gN@@@@@N^    Packages: 1536 (dpkg)
     _w@@@@@@@@@@@@@@@@P" _g@@@@@@@P"       Shell: bash 5.2.37
  _g@@@@@@@@@@@@@@@N"`  VMNN@NNNM^`         Display (PM1561P): 1920x1080 in 16", 60 Hz [External]
^MMM@@@@@@@@@@@MP" ,ggppww__                Terminal: /dev/pts/0
        `""""" _wNNNNNNNNNNNNNNNNNNN        CPU: Loongson-3A6000-HV (8) @ 2.50 GHz
            _gBNNNNNNNNNNNNNNNNNP"          GPU: Loongson 2K2000 / 7A2000 Chipset Display Controller
        _wNNNNNNNNNNNNNNNNNNMP`             Memory: 4.27 GiB / 31.63 GiB (13%)
     _gBNNNNNNNNNNNNNNNNNP"                 Swap: 52.75 MiB / 32.00 GiB (0%)
 _wNNNNNNNNNNNNNNNNNNNM^                    Disk (/): 147.24 GiB / 255.18 GiB (58%) - ext4
 ""Y^^MNNNNNNNNNNNNP`                       Local IP (enp2s0): 192.168.31.97/24
         `"""""""                           Locale: zh_CN.UTF-8

[nohwnd]

https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.architecture?view=net-10.0 correct