[bug] Logs not sent with .NET Framework in 1.11.0

[romerod]

Package

OpenTelemetry.Exporter.OpenTelemetryProtocol

Package Version

Package Name	Version
OpenTelemetry.Exporter.OpenTelemetryProtocol	1.11.0
OpenTelemetry	1.11.0

Runtime Version

net72

Description

After updating project to use version 1.11 logs are not sent anymore to endpoint.

Steps to Reproduce

Build and Execute OltpTest.csproj no log is sent

Build and Execute OltpTest.1.11.csproj log is sent.

OltpTest.zip

Expected Result

Log being sent.

Actual Result

No log being sent

Additional Context

No response

[romerod]

Same bug as #6067.
Tried using WinHttpHandler which supports HTTP/2 results in a System.Net.Http.HttpRequestException with BadRequest 400.
exporterOptions.HttpClientFactory = () => new HttpClient(new WinHttpHandler());

[romerod]

Closing as it's a duplicate of #6067