Add --arch option for --list-runtimes and --list-sdks in host (#116078)

Allow specifying --arch <arch> for --list-runtimes and --list-sdks commands in host. Must be in the order --list-runtimes/sdks --arch <arch>.
- If not specified, behaviour remains the same - list runtimes/SDKs for the invoked dotnet (for SDKs, any paths specified any found global.json are respected).
- If specified and not the same as the host architecture, searches for registered or default install locations for that architecture and lists runtimes/SDKs found there.
- If specified and the same as the host architecture, behaves the same as if not specified - note that this means it will not search for registered/default installs of the host architecture and only list runtimes/SDKs relative to the invoked dotnet.

New tests are in a HostCommands test class. This also moves some existing tests for host commands into the new class. This does remove tests running the host commands with the multi-level lookup environment variable set, but I don't think those are interesting anymore - it has been disabled since 7.0 and should always be disabled (unlike for actually running an app, where it can be based on the tfm).

Author: elinor-fung

src/installer/tests/HostActivation.Tests/DotnetArgValidation.cs

@@ -3,8 +3,6 @@
 
 using System;
 using System.IO;
-using System.Text;
-using Microsoft.DotNet.Cli.Build;
 using Microsoft.DotNet.TestUtils;
 using Xunit;
 
@@ -83,52 +81,6 @@ public void InvalidFileOrCommand_NoSDK_ListsPossibleIssues()
                 .And.FindAnySdk(false);
         }
 
-        [Fact]
-        public void DotNetInfo_NoSDK()
-        {
-            TestContext.BuiltDotNet.Exec("--info")
-                .CaptureStdOut()
-                .CaptureStdErr()
-                .Execute()
-                .Should().Pass()
-                .And.HaveStdOutMatching($@"Architecture:\s*{TestContext.BuildArchitecture}")
-                .And.HaveStdOutMatching($@"RID:\s*{TestContext.BuildRID}");
-        }
-
-        [Fact]
-        public void DotNetInfo_Utf8Path()
-        {
-            string installLocation = Encoding.UTF8.GetString("utf8-龯蝌灋齅ㄥ䶱"u8);
-            DotNetCli dotnet = new DotNetBuilder(sharedTestState.BaseDirectory.Location, TestContext.BuiltDotNet.BinPath, installLocation)
-                .Build();
-
-            var result = dotnet.Exec("--info")
-                .DotNetRoot(Path.Combine(sharedTestState.BaseDirectory.Location, installLocation))
-                .CaptureStdErr()
-                .CaptureStdOut(Encoding.UTF8)
-                .Execute();
-
-            result.Should().Pass()
-                .And.HaveStdOutMatching($@"DOTNET_ROOT.*{installLocation}");
-        }
-
-        [Fact]
-        public void DotNetInfo_WithSDK()
-        {
-            DotNetCli dotnet = new DotNetBuilder(sharedTestState.BaseDirectory.Location, TestContext.BuiltDotNet.BinPath, "withSdk")
-                .AddMicrosoftNETCoreAppFrameworkMockHostPolicy("1.0.0")
-                .AddMockSDK("1.0.0", "1.0.0")
-                .Build();
-
-            dotnet.Exec("--info")
-                .WorkingDirectory(sharedTestState.BaseDirectory.Location)
-                .CaptureStdOut()
-                .CaptureStdErr()
-                .Execute()
-                .Should().Pass()
-                .And.NotHaveStdOutMatching($@"RID:\s*{TestContext.BuildRID}");
-        }
-
         // Return a non-existent path that contains a mix of / and \
         private string GetNonexistentAndUnnormalizedPath()
         {

src/installer/tests/HostActivation.Tests/FrameworkResolution/MultipleHives.cs

@@ -138,55 +138,6 @@ private List<FrameworkInfo> GetExpectedFrameworks(bool? multiLevelLookup)
             return expectedList;
         }
 
-        [Theory]
-        [InlineData(true)]
-        [InlineData(null)]
-        [InlineData(false)]
-        public void ListRuntimes(bool? multiLevelLookup)
-        {
-            // Multi-level lookup is only supported on Windows.
-            if (!OperatingSystem.IsWindows() && multiLevelLookup != false)
-                return;
-
-            string expectedOutput = string.Join(
-                string.Empty,
-                GetExpectedFrameworks(false) // MLL Is always disabled for dotnet --list-runtimes
-                    .Select(t => $"{MicrosoftNETCoreApp} {t.Version} [{Path.Combine(t.Path, "shared", MicrosoftNETCoreApp)}]{Environment.NewLine}"));
-
-            // !!IMPORTANT!!: This test verifies the exact match of the entire output of the command (not a substring!)
-            // This is important as the output of --list-runtimes is considered machine readable and thus must not change even in a minor way (unintentionally)
-            RunTest(
-                new TestSettings().WithCommandLine("--list-runtimes"),
-                multiLevelLookup,
-                testApp: null)
-                .Should().HaveStdOut(expectedOutput)
-                .And.HaveStdErrContaining("Ignoring FX version [9999.9.9] without .deps.json");
-        }
-
-        [Theory]
-        [InlineData(true)]
-        [InlineData(null)]
-        [InlineData(false)]
-        public void DotnetInfo(bool? multiLevelLookup)
-        {
-            // Multi-level lookup is only supported on Windows.
-            if (!OperatingSystem.IsWindows() && multiLevelLookup != false)
-                return;
-
-            string expectedOutput =
-                $".NET runtimes installed:{Environment.NewLine}" +
-                string.Join(string.Empty,
-                    GetExpectedFrameworks(false) // MLL is always disabled for dotnet --info
-                        .Select(t => $"  {MicrosoftNETCoreApp} {t.Version} [{Path.Combine(t.Path, "shared", MicrosoftNETCoreApp)}]{Environment.NewLine}"));
-
-            RunTest(
-                new TestSettings().WithCommandLine("--info"),
-                multiLevelLookup,
-                testApp: null)
-                .Should().HaveStdOutContaining(expectedOutput)
-                .And.HaveStdErrContaining("Ignoring FX version [9999.9.9] without .deps.json");
-        }
-
         [Theory]
         [InlineData("net6.0", true, true)]
         [InlineData("net6.0", null, true)]