Add second and minute grains to sqlite

[villebro]

CATEGORY

• Enhancement (new features, refinement)

SUMMARY

Sqlite was missing the common time grains of second and minute.

TEST PLAN

Tested locally.

[codecov-io]

Codecov Report

Merging #7810 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #7810   +/-   ##
=======================================
  Coverage   65.89%   65.89%           
=======================================
  Files         459      459           
  Lines       22014    22014           
  Branches     2417     2417           
=======================================
  Hits        14507    14507           
  Misses       7386     7386           
  Partials      121      121

Impacted Files	Coverage Δ
superset/db_engine_specs/sqlite.py	66.66% <ø> (ø)	⬆️

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