fix: workers_script name -> id rename inside workers_route

[pcantea]

Fix for wrong attribute name hen migrating from cloudflare_worker_script to cloudflare_workers_scriptinside a worker_route resource. The name attribute must be changed to id, otherwise an error is thrown:

│ Error: Unsupported attribute
│
│   on segment_proxy.tf line 100, in resource "cloudflare_workers_route" "segment_api_route":
│  100:   script  = cloudflare_workers_script.segment_proxy.name
│
│ This object has no argument, nested block, or exported attribute named "name".

[vaishakdinesh]

Thank you! @pcantea
I added e2e test and merged #250