[storage-tuning] GCSFuse v2 tuning, caching, and benchmarking

[mmm]

Starting a series on tuning storage for various I/O profiles.

First pass, a tutorial for users to do their own GCSFuse v2 tuning, caching, benchmarking.

[mmm]

Useful docs for similar analysis using PDs:

• Benchmarking persistent disk performance on a Linux VM  |  Compute Engine Documentation  |  Google Cloud
• View Google Cloud latency dashboard  |  Performance Dashboard