[BP-48147] [Eventing][UI]: Able to modify to timer context size when function is deployed

Build - 7.0.2 - 6578

STEPS TO REPRODUCE
Create and deploy eventing handler.

UI

• Modify timer context size via UI and click on save. No error thrown.
• Try to pause the handler, following error is thrown.

  pause failed: {"code":38,"info":"Function: test setting: timer_context_size can only be altered when the function is paused or undeployed."}

REST API

• Try to modify timer context size when handler is deployed.

  curl -XPOST http://Administrator:password@10.112.190.102:8096/api/v1/functions/test/settings -d '{"timer_context_size": 200,"deployment_status":true,"processing_status":true}'

  {

  "name": "ERR_INVALID_CONFIG",

  "code": 38,

  "description": "Invalid configuration",

  "attributes": null,

  "runtime_info": {

  "code": 38,

  "info": "Function: test setting: timer_context_size can only be altered when the function is paused or undeployed."

  }

  }

  Appropriate error thrown.