Remove support for "environment" property from provisioning-info.json

Property environment is no longer relevant. The permissions are getting deployed to all environments automatically. There is no need to maintain, review and parse this property going forward.

Ref: https://github.com/microsoftgraph/kibali/blob/cf58f2c1f1ec9553f5b18dffe2a311e29a69adcc/src/kibali/ProvisioningInfo.cs#L15
Source: provisioningInfo.json
Snippet 1:

"AccessReview.Read.All": [
    {
        "id": "ebfcd32b-babb-40f4-a14b-42706e83bd28",
        "scheme": "DelegatedWork",
        "environment": "public", 
        "isHidden": false,
        "isEnabled": true,
        "resourceAppId": ""
    },
    {
        "id": "d07a8cc0-3d51-4b77-b3b0-32704d1f69fa",
        "scheme": "Application",
        "environment": "public",
        "isHidden": false,
        "isEnabled": true,
        "resourceAppId": ""
    }
],

Snippet 2:

"InformationProtectionConfig.Notify.All": [
      {
          "scheme": "Application",
          "environment": "public;FairFax",
          "isHidden": true,
          "isEnabled": true,
          "resourceAppId": "",
          "id": "934daffb-286a-4eb2-a311-173e110ffbc6"
      }
  ],

Follow up:

• Update the graph docs to remove references to this property.
• Update the source file to delete references to environment property.

Start with src/kibali/ProvisioningInfo.cs and provisioningInfo.json to trace how the environment property is represented and parsed. Find the Graph documentation references mentioned in the follow-up and remove those references as well; done means source handling and documentation no longer refer to environment.