Fix wrong compilation dir (#1474)

Closes
SoftUni-Internal/exam-systems-issues#1398

**Summary of the changes made**:
1. {Describe your changes in the list}
2.

Author: gogo4ds

Services/Common/OJS.Workers/OJS.Workers.Compilers/DotNetCompiler.cs

@@ -30,15 +30,9 @@ public override string ChangeOutputFileAfterCompilation(string outputFile)
 
         public override string BuildCompilerArguments(string inputFile, string outputFile, string additionalArguments)
         {
-            var inputFileDirectory = Path.GetDirectoryName(inputFile)
-                ?? throw new DirectoryNotFoundException($"Input file directory not found. Input file path value: {inputFile}");
-
-            var compilingDir = FileHelpers.BuildPath(inputFileDirectory, CompilationDirectoryName);
-            Directory.CreateDirectory(compilingDir);
-
             var arguments = new StringBuilder();
             arguments.Append("build ");
-            arguments.Append($"-o {compilingDir} ");
+            arguments.Append($"-o {this.CompilationDirectory} ");
             arguments.Append($"\"{inputFile}\" ");
             arguments.Append(additionalArguments);
             return arguments.ToString().Trim();