Use cucumber docstring to mock file upload

Author: dannyh79

Diff for: features/attendee_import.feature

@@ -1,4 +1,9 @@
 Feature: Attendee Importation
   Scenario: POST /attendees
-    When I make a POST request to "/attendees" with file "attendees.csv"
+    When I make a POST request to "/attendees" with file:
+    """
+    token,display_name,
+    "fccfc8bfa07643a1ca8015cbe74f5f17","Aotoki",
+    "93dc46e553ac602b0d6c6d7307e523f1","Danny",
+    """
     Then the response status should be 200

Diff for: features/support/apiSteps.ts

@@ -1,7 +1,6 @@
 import { Then, When } from '@cucumber/cucumber'
 import { WorkerWorld } from './world'
 import { expect } from 'expect'
-import { readFileSync } from 'node:fs'
 
 const nestedAttribute = (obj: any, path: string) =>
   path.split('.').reduce((prev, curr) => prev?.[curr], obj)
@@ -22,11 +21,10 @@ When(
 )
 
 When(
-  'I make a POST request to {string} with file {string}',
-  async function (this: WorkerWorld, path: string, filePath: string) {
+  'I make a POST request to {string} with file:',
+  async function (this: WorkerWorld, path: string, content: string) {
     const formData = new FormData()
-    const file = readFileSync(`${__dirname}/data/${filePath}`, 'utf8')
-    formData.append('file', file)
+    formData.append('file', content)
     this.apiResponse = await this.api.fetch(`https://ccip.opass.app${path}`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/x-www-form-urlencoded' },