Always include the original exception in HttpClient

[MihaZupan]

Fixes #84712

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Issue Details

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Fixes #84712

Author:	MihaZupan
Assignees:	MihaZupan
Labels:	area-System.Net.Http
Milestone:	8.0.0

[MihaZupan]

Example difference:

System.OperationCanceledException: The operation was canceled.
    at System.Net.Http.HttpClient.HandleFailure(Exception e, Boolean telemetryStarted, HttpResponseMessage response, CancellationTokenSource cts, CancellationToken cancellationToken, CancellationTokenSource pendingRequestsCts)
    at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)

System.Threading.Tasks.TaskCanceledException: The operation was canceled.
     ---> System.Net.Http.HttpRequestException: Useful information
     ---> System.Exception: Useful inner exception information
       --- End of inner exception stack trace ---
       at System.Net.Http.Functional.Tests.HttpClientTest.HttpClientSendTest.<Send_InnerHandlerThrows_OriginalExceptionInformationIsCaptured>g__InterestingMethodInTheStackTrace|6_1(Func`1 exceptionFactory)
       at System.Net.Http.Functional.Tests.HttpClientTest.HttpClientSendTest.<>c__DisplayClass6_0.<<Send_InnerHandlerThrows_OriginalExceptionInformationIsCaptured>b__0>d.MoveNext()
    --- End of stack trace from previous location ---
       at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
       --- End of inner exception stack trace ---
       at System.Net.Http.HttpClient.HandleFailure(Exception e, Boolean telemetryStarted, HttpResponseMessage response, CancellationTokenSource cts, CancellationToken cancellationToken, CancellationTokenSource pendingRequestsCts)
       at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)

[MihaZupan]

Test failure is #84257