[Performance] distributed deployments of NightHawk to enable distributed performance tests

[DelusionalOptimist]

Current Behavior

Right now performance tests using NightHawk are limited to single instance load generation. This limits the amount of traffic that can be generated to the output of the single machine that the benchmark tool runs on in or out of a cluster.

Desired Behavior

Support distributed deployments of NightHawk to enable users to run distributed performance tests to better mimic real-world, distributed systems scenarios.

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Resources

Proposed design spec: https://docs.google.com/document/d/1_hhQ5w1iLClgf7RvboI6il-eMKKAVPwz50GHm2VN4Bg/edit#heading=h.3tnqdf3a6jei

Additional Context
Load generators and meshery: https://docs.meshery.io/extensibility/load-generators
Performance management in meshery: https://docs.meshery.io/functionality/performance-management

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Contributor Resources

• See the Contributing to getnighthawk.dev Website
• See the Project Site section of GetNighthawk project doc

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