Add ErrorCode to RuntimeRudeEdit

## Background and Motivation

See https://github.com/dotnet/roslyn/pull/74625

## Proposed API

```diff
namespace Microsoft.CodeAnalysis.Emit;
{
public readonly struct RuntimeRudeEdit
{
+ public int ErrorCode { get; }

+ public RuntimeRudeEdit(string message, int errorCode)

+ [Obsolete("Specify errorCode")]
public RuntimeRudeEdit(string message);
}
```

## Usage Examples

Used by Roslyn EnC analyzer in the IDE to specify error code for runtime rude edit.

## Alternative Designs

## Risks