RCS1051: consider option `do_not_parenthesize_singleline_conditional_expression`

[RCS1051](https://github.com/JosefPihrt/Roslynator/blob/master/docs/analyzers/RCS1051.md)

**Product and Version Used**:
Microsoft Visual Studio Community 2019 Version 16.10.1
Roslynator.Analyzers 3.2.0 via Nuget

**Steps to Reproduce**:
.editorconfig:
```
dotnet_diagnostic.RCS1051.severity = warning
roslynator.RCS1051.do_not_parenthesize_single_token = true
```

```csharp
public class Foo
{
public bool Bar { get; }
}

...
var foo = new Foo();
foo.Bar ? 42 : 666; // <-
```

**Actual Behavior**:
Get diagnostic for RCS1051.

**Expected Behavior**:
No diagnostic for RCS1051.

If we add parentheses, then [IDE0047](https://docs.microsoft.com/ru-ru/dotnet/fundamentals/code-analysis/style-rules/ide0047-ide0048) works. Perhaps the new option `do_not_parenthesize_singleline_conditional_expression = bool` for RCS1051 would be helpful for this case.

Start with the linked RCS1051 documentation and reproduce the .editorconfig and C# example from the issue. Check how the existing do_not_parenthesize_single_token option affects the diagnostic. Done means the proposed single-line conditional option prevents the diagnostic for this case without changing other RCS1051 behavior.

Written by the indexing model from the issue text.