-Proxy seems to be ignored on Get-MgPolicyClaimMappingPolicy

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• Make sure you can reproduce this issue using the latest released version of Microsoft.Graph or Microsoft.Graph.Beta.
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Describe the bug
Have fiddler listening on 8888 locally, but -Proxy isn't doing anything different

To Reproduce
Steps to reproduce the behavior:

1. Get-MgPolicyClaimMappingPolicy -Proxy "http://127.0.0.1:8888"
2. Get-MgPolicyClaimMappingPolicy -Proxy "http://localhost:8888"

Expected behavior
Expect to see the http request/response in fiddler

Debug Output

C:\src> Get-MgPolicyClaimMappingPolicy  -Proxy "http://127.0.0.1:8888" -Debug
DEBUG: [CmdletBeginProcessing]: - Get-MgPolicyClaimMappingPolicy begin processing with parameterSet 'List'.
DEBUG: [Authentication]: - AuthType: 'Delegated', TokenCredentialType: 'InteractiveBrowser', ContextScope: 'CurrentUser', AppName: 'Microsoft Graph Command Line Tools'.
DEBUG: [Authentication]: - Scopes: [Application.Read.All, Directory.AccessAsUser.All, Domain.ReadWrite.All, Group.Read.All, openid, Policy.Read.All, profile, RoleManagement.Read.Directory, User.Read, User.Read.All, UserAuthenticationMethod.ReadWrite.All, email].
DEBUG: ============================ HTTP REQUEST ============================

HTTP Method:
GET

Absolute Uri:
https://graph.microsoft.com/v1.0/policies/claimsMappingPolicies

Headers:
FeatureFlag                   : 00000043
Cache-Control                 : no-store, no-cache
User-Agent                    : Mozilla/5.0,(Windows NT 10.0; Microsoft Windows 10.0.19045; en-US),PowerShell/7.3.6
Accept-Encoding               : gzip
SdkVersion                    : graph-powershell/2.3.0
client-request-id             : 3af0e37d-7af2-4370-b13f-804d6a192e71

Body:



DEBUG: ============================ HTTP RESPONSE ============================

Status Code:
OK

Headers:
Cache-Control                 : no-cache
Transfer-Encoding             : chunked
Vary                          : Accept-Encoding
Strict-Transport-Security     : max-age=31536000
request-id                    : 71d6d935-f50f-4a94-ae50-5d283cf2ce01
client-request-id             : 3af0e37d-7af2-4370-b13f-804d6a192e71
x-ms-ags-diagnostic           : {"ServerInfo":{"DataCenter":"West Central US","Slice":"E","Ring":"1","ScaleUnit":"001","RoleInstance":"CY4PEPF00005443"}}
x-ms-resource-unit            : 1
OData-Version                 : 4.0
Date                          : Tue, 19 Sep 2023 23:27:13 GMT

Body:
{
  "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#policies/claimsMappingPolicies",
  "value": [
    {
      "id": "6e1fa6a9-a7af-4b6c-b0f7-",
      "deletedDateTime": null,
      "definition": [
        "{\"ClaimsMappingPolicy\":{\"Version\":1,\"IncludeBasicClaimSet\":true,\"ClaimsSchema\":[{\"Source\":\"user\",\"ID\":\"JobTitle\",\"JwtClaimType\":\"JobTitle\"}]}}"
      ],
      "displayName": "Add JobTitle to claims",
      "isOrganizationDefault": false
    },
    {
      "id": "b6a570f5-c755-4b49-9c25-",
      "deletedDateTime": null,
      "definition": [
        "{\"ClaimsMappingPolicy\":{\"ClaimsSchema\":[],\"ClaimsTransformations\":[],\"GroupFilter\":{\"MatchOn\":\"samAccountName\",\"Type\":\"prefix\",\"Value\":\"App \"},\"Version\":1}}"
      ],
      "displayName": "Policy",
      "isOrganizationDefault": false
    }
  ]
}

Module Version

ModuleType Version    PreRelease Name                                ExportedCommands
---------- -------    ---------- ----                                ----------------
Script     2.3.0                 Microsoft.Graph.Authentication      {Add-MgEnvironment, Connect-MgGraph, Disconnect-MgGraph,…
Script     2.3.0                 Microsoft.Graph.Identity.SignIns    {Confirm-MgRiskyServicePrincipalCompromised, Confirm-MgR…

Environment Data

Name                           Value
----                           -----
PSVersion                      7.3.6
PSEdition                      Core
GitCommitId                    7.3.6
OS                             Microsoft Windows 10.0.19045
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Screenshots
N/A

Additional context
tried common proxy configs like $Env:HTTPS_PROXY and [System.Net.Http.HttpClient]::DefaultProxy = New-Object System.Net.WebProxy('http://localhost:8888') as well. Also tried with -ProxyUseDefaultCredentials switch

Start by reproducing the proxy behavior with Get-MgPolicyClaimMappingPolicy using the 127.0.0.1:8888 and localhost:8888 examples, with -Debug and Fiddler listening. Trace how the cmdlet handles -Proxy and -ProxyUseDefaultCredentials, then verify that the resulting HTTP request is visible through Fiddler.