Change Low Sensitivity Alert to noncore

[bchen1116]

fix #2190

[codecov]

Codecov Report

Merging #2418 (d0bdd36) into main (5256584) will not change coverage.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main   #2418   +/-   ##
=====================================
  Coverage   99.7%   99.7%           
=====================================
  Files        283     283           
  Lines      25240   25240           
=====================================
  Hits       25140   25140           
  Misses       100     100           

Impacted Files	Coverage Δ
evalml/objectives/utils.py	100.0% <ø> (ø)
evalml/tests/objective_tests/test_objectives.py	100.0% <100.0%> (ø)

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[jeremyliweishih]

nice!