.NET container-native build support

[stevefan1999-personal]

Starting from .NET 7, you can build image directly into OCI images like Jib and kanico by installing a simple Microsoft.NET.Build.Containers package.

<Project Sdk="Microsoft.NET.Sdk.Web">

	<PropertyGroup>
		<TargetFramework>net7.0</TargetFramework>
		<Nullable>enable</Nullable>
		<ImplicitUsings>enable</ImplicitUsings>
		<DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
	</PropertyGroup>

	<ItemGroup>
		<PackageReference Include="GitVersion.MsBuild" Version="5.11.1">
			<PrivateAssets>all</PrivateAssets>
		</PackageReference>
		<PackageReference Include="Microsoft.NET.Build.Containers" Version="0.2.7" />
		<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.17.0" />
	</ItemGroup>

	<ItemGroup>
		<ContainerPort Include="5000" Type="tcp" />
		<ContainerPort Include="5001" Type="tcp" />
		<ContainerPort Include="5153" Type="tcp" />
		<ContainerPort Include="7023" Type="tcp" />
		<ContainerPort Include="80" Type="tcp" />
		<ContainerPort Include="443" Type="tcp" />
	</ItemGroup>

	<Target Name="BeforePublishContainer" BeforeTargets="ComputeContainerConfig" DependsOnTargets="RunGitVersion">
		<PropertyGroup>
			<ContainerImageTag>$(GitVersion_ShortSha)</ContainerImageTag>
		</PropertyGroup>
	</Target>

</Project>

We should support this use case in devspace, and even exploit some existing metadata to speed up development experience for dotnet hackers.