Provide updated JsonPatch sample for new hosting model

[natelaff]

Show example with new hosting model for
https://docs.microsoft.com/en-us/aspnet/core/web-api/jsonpatch?view=aspnetcore-6.0#json-patch-addnewtonsoftjson-and-systemtextjson

The current implementation results in warning

Warning ASP0000 Calling 'BuildServiceProvider' from application code results in an additional copy of singleton services being created. Consider alternatives such as dependency injecting services as parameters to 'Configure'.

This is relevant to code

static NewtonsoftJsonPatchInputFormatter GetJsonPatchInputFormatter()
{
    var builder = new ServiceCollection()
        .AddLogging()
        .AddMvc()
        .AddNewtonsoftJson()
        .Services.BuildServiceProvider();

    return builder
        .GetRequiredService<IOptions<MvcOptions>>()
        .Value
        .InputFormatters
        .OfType<NewtonsoftJsonPatchInputFormatter>()
        .First();
}

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Document Details

⚠ Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.

• ID: 20acee3e-8b6e-b3fb-8271-661e1a287bdd
• Version Independent ID: 20acee3e-8b6e-b3fb-8271-661e1a287bdd
• Content: Code samples migrated from ASP.NET Core 5.0 to 6.0
• Content Source: aspnetcore/migration/50-to-60-samples.md
• Product: aspnet-core
• Technology: aspnetcore-migration
• GitHub Login: @Rick-Anderson
• Microsoft Alias: riande

[Rick-Anderson]

@pranavkm @captainsafia your analyzers are working.

@natelaff we'll try to get a sample for you.

[Rick-Anderson]

@natelaff would you be able to submit a PR to fix this?

[natelaff]

@Rick-Anderson i don't know how to fix this 🤷‍♂️ its Microsoft's guidance that is triggering the warning. I don't know the proper method hence me opening this issue ;)