Opsgenie Plugin support schedules/teams ID and Name

[EdwardDowling]

Buddy PR for #44342

In a previous PR (#43535), we identified that the Opsgenie alert payload was using the schedule ID, while the documentation refers to the schedule name in the annotations.

To support backwards compatibility, both ID and Name were added to the payload. However, the Opsgenie API requires only one of these fields, not both.

All Opsgenie IDs (schedules, teams, requests, etc.) are UUIDs. Therefore, in this PR, I propose checking if the schedule/team in the annotation is a UUID. If it is, we will include the ID in the payload; otherwise, we will include the Name.

Example:

kind: role
metadata:
  name: prod-write-access-request
spec:
  allow:
    request:
      annotations:
        teleport.dev/notify-services:
        - MySchedule
        - bb4d9938-c3c2-455d-aaab-727aa701c0d8
        teleport.dev/teams:
        - MyTeam
        - aee8a0de-c80f-4515-a232-501c0bc9d715
      roles:
      - prod-write-role

Results in following payload

{
  "message": "Access request from ...",
  "alias": "....",
  "description":"....",
  "responders": [
        {
           "type": "schedule",
           "name": "MySchedule"
        },
        {
           "type": "schedule",
           "id": "bb4d9938-c3c2-455d-aaab-727aa701c0d8"
        },
        {
           "type": "team",
           "name": "MyTeam"
        },
        {
           "type": "team",
           "id": "aee8a0de-c80f-4515-a232-501c0bc9d715"
        }
     ],
  "priority":"P2"

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@EdwardDowling See the table below for backport results.

Branch	Result
branch/v15	Failed
branch/v16	Create PR