fix(plugin-chart-table): ignore duplicate percent metrics

[ktmud]

🐛 Bug Fix

Silently ignore duplicate percent metrics.

Currently we do this for metrics, but adding percent metrics with the same name may still cause an error. This fixes it.

Before

After

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[ktmud]

Please ignore the bad branch name.

[codecov]

Codecov Report

Merging #994 (3ac5dab) into master (deeee7c) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #994   +/-   ##
=======================================
  Coverage   27.94%   27.94%           
=======================================
  Files         413      413           
  Lines        8523     8523           
  Branches     1204     1204           
=======================================
  Hits         2382     2382           
  Misses       5987     5987           
  Partials      154      154           

Impacted Files	Coverage Δ
plugins/plugin-chart-table/src/index.ts	0.00% <ø> (ø)
plugins/plugin-chart-table/src/buildQuery.ts	63.04% <100.00%> (ø)

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[ktmud]

I also changed how the default buildQuery function is exported.

cc @simcha90