perf(etw): Increase default max buffers

[rabbitstack]

What is the purpose of this PR / why it is needed?

Increase ETW session default max buffers to the number of CPUs * 8.

What type of change does this PR introduce?

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/kind feature (non-breaking change which adds functionality)

/kind bug-fix (non-breaking change which fixes an issue)

/kind refactor (non-breaking change that restructures the code, while not changing the original functionality)

/kind breaking (fix or feature that would cause existing functionality to not work as expected

/kind cleanup

/kind improvement

/kind design

/kind documentation

/kind other (change that doesn't pertain to any of the above categories)

Any specific area of the project related to this PR?

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/area instrumentation

/area telemetry

/area rule-engine

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/area yara

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Special notes for the reviewer

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Does this PR introduce a user-facing change?

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