feat(linq): switch pivot() and drop() function to achieve better perf

[bednar]

Proposed Changes

The pivot() and drop() function was switch to achieve better performance - https://github.com/influxdata/EAR/issues/2182

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• dotnet test completes successfully
• Commit messages are in semantic format
• Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Merging #188 (95d6344) into master (92ccdce) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #188   +/-   ##
=======================================
  Coverage   85.15%   85.15%           
=======================================
  Files          71       71           
  Lines        6096     6096           
=======================================
  Hits         5191     5191           
  Misses        905      905           

Impacted Files	Coverage Δ
Client.Linq/Internal/QueryAggregator.cs	98.95% <100.00%> (ø)

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