[BUG] IFormFile in c# scripting

## Description
seems ipossible to work with IFormFIle inside a c# scipting activity

## Steps to Reproduce
1. create a workflow with the designer
2. add an http endpoint that accept formfile and it stores insiede a variable
3. add a c# scriptting activities that have this code inside:

##error
error CS0234: namespace 'AspNetCore' doesnt exisit insiede'Microsoft'...

##stack trace
at Microsoft.CodeAnalysis.Scripting.ScriptBuilder.ThrowIfAnyCompilationErrors(DiagnosticBag diagnostics, DiagnosticFormatter formatter)
at Microsoft.CodeAnalysis.Scripting.ScriptBuilder.CreateExecutor[T](ScriptCompiler compiler, Compilation compilation, Boolean emitDebugInformation, CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Scripting.Script`1.GetExecutor(CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Scripting.Script`1.CommonGetExecutor(CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Scripting.Script`1.TryGetPrecedingExecutors(Script lastExecutedScriptInChainOpt, CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Scripting.Script`1.GetPrecedingExecutors(CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Scripting.Script`1.RunAsync(Object globals, Func`2 catchException, CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Scripting.Script`1.RunAsync(Object globals, CancellationToken cancellationToken)
at Elsa.CSharp.Services.CSharpEvaluator.EvaluateAsync(String expression, Type returnType, ExpressionExecutionContext context, ExpressionEvaluatorOptions options, Func`2 configureScriptOptions, Func`2 configureScript, CancellationToken cancellationToken)
at Elsa.CSharp.Extensions.CSharpEvaluatorExtensions.EvaluateAsync(ICSharpEvaluator evaluator, String expression, Type returnType, ExpressionExecutionContext context, ExpressionEvaluatorOptions options, CancellationToken cancellationToken)
at Elsa.CSharp.Activities.RunCSharp.ExecuteAsync(ActivityExecutionContext context)
at Elsa.Workflows.Activity.Elsa.Workflows.Contracts.IActivity.ExecuteAsync(ActivityExecutionContext context)
at Elsa.Workflows.Middleware.Activities.DefaultActivityInvokerMiddleware.ExecuteActivityAsync(ActivityExecutionContext context)
at Elsa.Workflows.Runtime.Middleware.Activities.BackgroundActivityInvokerMiddleware.ExecuteActivityAsync(ActivityExecutionContext context)
at Elsa.Workflows.Middleware.Activities.DefaultActivityInvokerMiddleware.InvokeAsync(ActivityExecutionContext context)
at Elsa.Workflows.Middleware.Activities.NotificationPublishingMiddleware.InvokeAsync(ActivityExecutionContext context)
at Elsa.Workflows.Middleware.Activities.ExecutionLogMiddleware.InvokeAsync(ActivityExecutionContext context)

[file.json](https://github.com/elsa-workflows/elsa-core/files/15337878/file.json)