Updates Rapid bucket benchmarks

[ankitaluthra1]

This pull request updates the performance documentation in rapid_storage_support.rst by adding a 'Speedup Factor' column to the Sequential Reads, Random Reads, and Writes throughput tables.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.32%. Comparing base (d35f8f8) to head (a7fb4b4).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #802      +/-   ##
==========================================
+ Coverage   75.98%   76.32%   +0.33%     
==========================================
  Files          14       14              
  Lines        2665     2665              
==========================================
+ Hits         2025     2034       +9     
+ Misses        640      631       -9     

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