message: fix(plugin-flow-server): allow any type of value for iterate while saving it to database
  The iterate value should only accept the following:
  1. string type. ex: "=$flow.in", "=$env[variable]"
  2. array type. ex: { mapping: [1, 2, 3, 4] }
  3. integer type. ex: 10
  fixes
diff: "settings": {
  "type": "object",
  "properties": {
  - "iterate": {
  - "type": [
  - "string",
  - "integer"
  - ]
  - },
  + "iterate": true,
  "flowPath": {
  "type": "string"
  }
  