Add EventSource event method generation

[Cricle]

Contributes to #107069

• Final result

//Writing code...

[EventSourceEventGenerate]
internal sealed unsafe /*It's mandatory or in method write unsafe*/ partial class RuntimeEventSource : EventSource
{
    [Event(1)]
    public partial void GoHome(string address,double usedTime);
}


//Will generated
public void GoHome(string address,double usedTime)
{
    address ??= System.String.Empty;
    global::System.Diagnostics.Tracing.EventSource.EventData* datas = stackalloc global::System.Diagnostics.Tracing.EventSource.EventData[2];
    datas[0] = new global::System.Diagnostics.Tracing.EventSource.EventData
    {
        //Use unsafe method because it is faster than fixed, and easily to generate
        DataPointer = (nint)global::System.Runtime.CompilerServices.Unsafe.AsPointer(ref global::System.Runtime.InteropServices.MemoryMarshal.GetReference(global::System.MemoryExtensions.AsSpan(address)),
        Size = (address.Length + 1) * sizeof(char)
    };
    datas[1] = new global::System.Diagnostics.Tracing.EventSource.EventData
    {
        DataPointer = (nint)(&usedTime),
        Size = sizeof(double)
    };
    WriteEventWithRelatedActivityIdCore(1, null, 2, datas);
    OnRaise(i, address);
}

[global::System.Diagnostics.Tracing.NonEventAttribute]
partial void OnRaise(int i, string address);

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[Cricle]

～But I don't how to start the generation test. ～

～Please let me know if you need additional tests, or if you need to modify the way you test～

I think I found how to test this code.

[tommcdon]

@noahfalk @tarekgh would you mind reviewing this PR?

[tarekgh]

@tommcdon @Cricle this need to go through design review before accepting it. https://github.com/dotnet/runtime/blob/main/docs/project/api-review-process.md

[Cricle]

@tommcdon @Cricle this need to go through design review before accepting it. https://github.com/dotnet/runtime/blob/main/docs/project/api-review-process.md

Would I need to create an 'API Proposal' issue link this PR?

[tarekgh]

@Cricle you may update #107069 and use it for the design review. I would suggest closing this PR till the design review is done because this will depend on when the design review will be scheduled. Thanks for your help here!

[Cricle]

@tarekgh @tommcdon I has been update this issure #107069

[tarekgh]

I'll let @noahfalk look at the proposal and mark the issue as ready for review when it is ready. @Cricle do you mind closing this PR till the request get reviewed and approved?

[noahfalk]

Thanks @Cricle - I wasn't able to get to this today but its on my todo list to look at tomorrow.