OZG-5977 add function signature for state clear

alfa-client/libs/binary-file-shared/src/lib/binary-file.service.spec.ts

@@ -108,6 +108,10 @@ describe('BinaryFileService', () => {
     //Implement me
   });
 
+  describe('clear uploaded files', () => {
+    //Implement me
+  });
+
   describe('upload file new', () => {
     const file: File = createFile();
     const uploadUrl: string = faker.internet.url();

alfa-client/libs/binary-file-shared/src/lib/binary-file.service.ts

@@ -81,6 +81,10 @@ export class BinaryFileService {
     //Implement me
   }
 
+  public clearUploadedFiles(type: FileUploadType): void {
+    //Implement me
+  }
+
   //TODO Rename
   public uploadFileNew(toUploadFile: ToUploadFile): void {
     if (!(toUploadFile.uploadUrl in this.uploadFiles.value)) this.uploadFiles.value[toUploadFile.type] = EMPTY_ARRAY;