chore: translate fractional time grains

[john-bodley]

💔 Breaking Changes

🏆 Enhancements

📜 Documentation

🐛 Bug Fix

🏠 Internal

Updating the time grain definitions as described in apache/superset#17078 —which is dependent on this change.

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[betodealmeida]

This looks good. Unfortunately I no longer remember why I used fractional time grains initially.

[codecov]

Codecov Report

Merging #1404 (089a642) into master (e5e8b66) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1404   +/-   ##
=======================================
  Coverage   30.41%   30.41%           
=======================================
  Files         497      497           
  Lines        9996     9996           
  Branches     1687     1687           
=======================================
  Hits         3040     3040           
  Misses       6710     6710           
  Partials      246      246           

Impacted Files	Coverage Δ
...-core/src/time-format/TimeFormatsForGranularity.ts	100.00% <ø> (ø)
packages/superset-ui-core/src/time-format/types.ts	100.00% <ø> (ø)
...ime-format/utils/createTimeRangeFromGranularity.ts	100.00% <ø> (ø)

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