Add missing Windows exclusion for pprof crate in sdk/benches

[drewrelmas]

Fixes # (Not Applicable)
Design discussion issue (if applicable) # (Not Applicable)

Changes

After cloning down the repository for the first time on Windows, noticed build failures in 2 places around import of pprof crate:

failed to resolve: use of undeclared crate or module pprof
use of undeclared crate or module pprof

Looking at other references in the project, including the cargo.toml, it is clear they should have [cfg markers disabling them for Windows developers.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[cijothomas]

Thanks!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.0%. Comparing base (189078d) to head (1e47616).
Report is 3 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2648   +/-   ##
=====================================
  Coverage   79.0%   79.0%           
=====================================
  Files        120     120           
  Lines      22512   22512           
=====================================
  Hits       17791   17791           
  Misses      4721    4721           

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