Revert "[fix] make names non-nullable"

[serenajiang]

Reverts #8332

Some issue with foreign key constraints.

[codecov-io]

Codecov Report

Merging #8363 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #8363   +/-   ##
=======================================
  Coverage   67.57%   67.57%           
=======================================
  Files         448      448           
  Lines       22527    22527           
  Branches     2364     2364           
=======================================
  Hits        15222    15222           
  Misses       7167     7167           
  Partials      138      138

Impacted Files	Coverage Δ
superset/connectors/druid/models.py	82.41% <100%> (ø)	⬆️
superset/connectors/sqla/models.py	84.96% <100%> (ø)	⬆️
superset/models/core.py	81.93% <100%> (ø)	⬆️

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[villebro]

Was this fundamentally the wrong solution, or is it just a bug in the PR? Feels like fixing the problem would be a better solution than reverting..

[serenajiang]

Just a bug in the PR - I'll fix the problem soon, but this is breaking deploys, so for now, it might be better to revert it just to keep things consistent.

[villebro]

gotcha 👍