refactor(rules): Rename and restructure LSASS memory dump rule

[rabbitstack]

Whitelist system processes in the open_process macro step and remove extra path conditions in the create_file stage. Also, simplify the output and reword the rule description.

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

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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

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/area instrumentation

/area telemetry

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