Update public benchmarks for gcsfuse version v3.0.0

[meet2mky]

Description

Update benchmarking numbers for GCSFuse Version 3.0.0 at commitID

• For each read benchmark metadata cache was prefetched using ls -R "$MOUNT_POINT"
• For each write benchmark we ran it twice to ensure first benchmark creates files and then we delete files to ensure negative stat cache and then results of second write benchmarks were taken.
• Converted GiB and MiB to GB and MB for bandwidth calculation.

Link to the issue in case of a bug fix.

b/415727864

Testing details

1. Manual - NA
2. Unit tests - NA
3. Integration tests - NA

Any backward incompatible change? If so, please explain.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.79%. Comparing base (a651d01) to head (d722ce8).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3399      +/-   ##
==========================================
+ Coverage   78.78%   78.79%   +0.01%     
==========================================
  Files         135      135              
  Lines       18164    18164              
==========================================
+ Hits        14310    14312       +2     
+ Misses       3378     3376       -2     
  Partials      476      476              

Flag	Coverage Δ
unittests	78.79% <ø> (+0.01%)	⬆️

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