Updates to tools/tracing and verification for 6.9:

Tracing:

- Update makefiles for latency-collector and RTLA, using tools/build/
  makefiles like perf does, inheriting its benefits. For example, having a
  proper way to handle library dependencies.

- The timerlat tracer has an interface for any tool to use.  rtla timerlat
  tool uses this interface dispatching its own threads as workload. But,
  rtla timerlat could also be used for any other process. So, add 'rtla
  timerlat -U' option, allowing the timerlat tool to measure the latency of
  any task using the timerlat tracer interface.

Verification:

- Update makefiles for verification/rv, using tools/build/ makefiles like
  perf does, inheriting its benefits.  For example, having a proper way to
  handle dependencies.
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