Divisions in TO API uses non-RFC3339 date/time strings

[jagan-parthiban]

Parent Issue: #5911

Breaking down the parent issue #5911 in smaller issues to raise separate, reviewable PRs for each of the services.

Traffic Control components affected:

• Traffic Ops
• Documentation

Current behavior:

Divisions Using Deprecated TimeNoMod & TimeLayout

curl --request GET \
  --url https://localhost:8443/api/4.1/divisions


{
	"response": [
		{
			"id": 33,
			"lastUpdated": "2023-05-19 09:39:09+05",
			"name": "Chennai"
		},
		{
			"id": 34,
			"lastUpdated": "2023-06-26 15:29:31+05",
			"name": "Mumbai"
		}
	]
}

Expected behavior:

Divisions to Use RFC3339 Format

curl --request GET \
  --url https://localhost:8443/api/5.0/divisions


{
	"response": [
		{
			"id": 33,
			"lastUpdated": "2023-05-19T09:39:09.761097+05:30",
			"name": "Chennai"
		},
		{
			"id": 34,
			"lastUpdated": "2023-06-26T15:29:31.872822+05:30",
			"name": "Mumbai"
		}
	]
}

Steps to reproduce:

Make the above api call to 4.1 version