Telemetry-step-03: add full support for distributed tracing #1185

This is a quite big MR. The added code must be seen as a single functional block. Splitting it into smaller ones makes no sense and would not be satisfying in terms of code coverage. This MR will be presented/commented/reviewed in a dedicated meeting.

This is part of #1185.

• Rebase, fix conflicts
• make it compile and passing test
• rebase
• add catch2 test
  • using ostream exporter and check that kernel traces were outputted
  • add DS with tracing and check
• Issue for kernel_traces_enabled doing nothing. kernel tracing is already used in pytango.
• upstream issue for opentelemetry-cpp that ostream exporter with batch processing produces garbage logs for strings, https://github.com/open-telemetry/opentelemetry-cpp/issues/2651
• Resolve WIP commit for CI
• Get it compiled on windows
• Cleanup commits and fix conflicts
• Feedback from Anton if it does not crash anymore

Preliminary documentation can be found at tango-doc#403.