ref(profiling) store unit on profile chart

[JonasBa]

Since continuous profiles are in ms, we need to ensure the duration check is correctly computed based off the profile chart units

[codecov]

Bundle Report

Changes will increase total bundle size by 537 bytes ⬆️

Bundle name	Size	Change
app-webpack-bundle-array-push	27.96MB	537 bytes ⬆️

[codecov]

Codecov Report

Attention: Patch coverage is 41.66667% with 7 lines in your changes missing coverage. Please review.

Project coverage is 78.11%. Comparing base (85148ec) to head (f9d3444).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #74152      +/-   ##
==========================================
- Coverage   78.11%   78.11%   -0.01%     
==========================================
  Files        6661     6661              
  Lines      297737   297746       +9     
  Branches    51257    51259       +2     
==========================================
+ Hits       232573   232578       +5     
- Misses      58849    58853       +4     
  Partials     6315     6315              

Files	Coverage Δ
...ents/profiling/flamegraph/continuousFlamegraph.tsx	0.00% <ø> (ø)
...app/components/profiling/flamegraph/flamegraph.tsx	51.47% <ø> (ø)
...omponents/profiling/flamegraph/flamegraphChart.tsx	57.84% <60.00%> (+2.28%)	⬆️
static/app/utils/profiling/flamegraphChart.tsx	22.64% <33.33%> (+0.64%)	⬆️
static/app/utils/profiling/units/units.ts	59.34% <25.00%> (-2.03%)	⬇️