Update Connect-EntraExporter with new sovereign cloud endpoints

[SamErde]

Connect-EntraExporter.ps1 uses an outdated list of sovereign cloud names and endpoints. These should be updated to reflect additions and changes:

Name         AzureADEndpoint                        GraphEndpoint                           Type
----         ---------------                        -------------                           ----
BleuCloud    https://login.sovcloud-identity.fr     https://graph.svc.sovcloud.fr           Built-in
China        https://login.chinacloudapi.cn         https://microsoftgraph.chinacloudapi.cn Built-in
DelosCloud   https://login.sovcloud-identity.de     https://graph.svc.sovcloud.de           Built-in
Global       https://login.microsoftonline.com      https://graph.microsoft.com             Built-in
GovSGCloud   https://login.sovcloud-identity.sg     https://graph.svc.sovcloud.sg           Built-in
USGov        https://login.microsoftonline.us       https://graph.microsoft.us              Built-in
USGovDoD     https://login.microsoftonline.us       https://dod-graph.microsoft.us          Built-in

I also noted a new requirement in the latest documentation:

Sovereign cloud environments (BleuCloud, DelosCloud, GovSGCloud) require a custom application registration. You cannot use the default Microsoft Graph PowerShell application in these environments. When registering your application, add an additional redirect URI of ms-appx-web://Microsoft.AAD.BrokerPlugin/<YOUR_APP_CLIENT_ID> to support WAM broker-based authentication. Requires Microsoft.Graph.Authentication v2.36.1 or later.
https://github.com/microsoftgraph/msgraph-sdk-powershell/pull/3595/changes#diff-91906a228bc2821f07fd4b64d001f7ac10d35a60fe4bc9b1230fa9da9ca58d63R68-R69