update task submission message and remove icon

Author: jatinriverlane

aqueductcore/frontend/src/__tests__/Extensions.test.tsx

@@ -137,7 +137,7 @@ test.skip("submit the form and success modal", async () => {
     const runButton = await findByTitle("run_extension");
     await userEvent.click(runButton)
     //TODO: This should be fixed with the Apollo Cache. As in the code we're using retriveving experimentUuid from cache.
-    const successModal = await findByText("Execution finished successfully")
+    const successModal = await findByText("Task submitted")
     expect(successModal).toBeInTheDocument()
 });
 

aqueductcore/frontend/src/components/organisms/ExtensionModal/index.tsx

@@ -152,8 +152,11 @@ function ExtensionModal({ isOpen, handleClose, selectedExtension }: ExtensionMod
             include: "active",
         });
         toast.success(
-            "Execution finished successfully",
-            { id: "exec_extension_success" }
+            "Task submitted",
+            {
+                id: "exec_extension_success",
+                icon: null
+            }
         )
     }