Warning NETSDK1179 is always raised

[nagya]

Describe the bug

The warning NETSDK1179 is always raised when the --runtime switch is used, even if --self-contained or --no-self-contained is also used. This started in the 6.0.300 stable release, and unconditionally: when the --self-contained switch is used, when the --no-self-contained switch is used, or when neither switch is used. It's impossible to get warning-free behavior. In a typical CI scenario, where warnings are treated as errors, this bug unconditionally fails all builds.

To Reproduce

% cat Test1.csproj  ## no other files in the project
<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
  </PropertyGroup>
</Project>

% dotnet --version
6.0.300

% dotnet build --self-contained --runtime osx-x64  
Microsoft (R) Build Engine version 17.2.0+41abc5629 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

  Determining projects to restore...
  Restored /Users/nagya/ms/Test1B/Test1.csproj (in 115 ms).
/usr/local/share/dotnet/sdk/6.0.300/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets(1114,5): warning NETSDK1179: One of '--self-contained' or '--no-self-contained' options are required when '--runtime' is used. [Test1.csproj]
  Test1 -> /Users/nagya/ms/Test1B/bin/Debug/net6.0/osx-x64/Test1.dll

Build succeeded.

/usr/local/share/dotnet/sdk/6.0.300/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets(1114,5): warning NETSDK1179: One of '--self-contained' or '--no-self-contained' options are required when '--runtime' is used. [Test1.csproj]
    1 Warning(s)
    0 Error(s)

Time Elapsed 00:00:01.09
% 

Exceptions (if any)

Further technical details

% dotnet --info

.NET SDK (reflecting any global.json):
 Version:   6.0.300
 Commit:    8473146e7d

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  12.3
 OS Platform: Darwin
 RID:         osx.12-x64
 Base Path:   /usr/local/share/dotnet/sdk/6.0.300/

Host (useful for support):
  Version: 6.0.5
  Commit:  70ae3df4a6

.NET SDKs installed:
  6.0.300 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 6.0.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 6.0.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET runtimes or SDKs:
  https://aka.ms/dotnet-download

[baronfel]

This is a duplicate of #24269. Despite the name of the issue, the root cause is the same.