[Profiling] Add field profiling.agent.config.sampling_frequency to profiling-hosts #117752
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With 9.0.0, the profiling data will be generated with a sampling frequency of 19Hz instead of 20Hz.
Knowing the sampling frequency allows the ES profiling plugin and Kibana to correctly calculate core seconds, CO2 emission and $ costs for different / mixed sampling frequencies. So far, a fixed frequency of 20Hz was required for statistical correctness.