RFC: Debug/tracing feature flags

[taqtiqa-mark]

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I can't get conclusive debug output.

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I run a command and the debug output reveals root cause of the problem.

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See PR #2697

Proposal

Feature flags:

These flags are not part of the full feature:

• spans: activates tracing spans/events/logs.
• debug: Activate debug level spans targeting app-hyper debugging
• trace: Activate debug and trace level spans targeting hyper internal debugging.
• jaeger: Setup the stack required to consume Hyper trace output in Jaeger