refactor: Replace react-bootstrap MenuItems with Antd Menu

[kgabryje]

SUMMARY

Replaces MenuItems in SubMenu, PopoverDropdown and Button components.
The highlight colour in PopoverDropdown is slightly different (as on the screenshots), because the old one wasn't available in Superset theme.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

Before:

After:

TEST PLAN

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

[kgabryje]

@rusackas @junlincc Can you take a look?

[codecov-io]

Codecov Report

Merging #11555 into master will decrease coverage by 5.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #11555      +/-   ##
==========================================
- Coverage   66.62%   61.45%   -5.18%     
==========================================
  Files         875      420     -455     
  Lines       42035    26194   -15841     
  Branches     3909        0    -3909     
==========================================
- Hits        28006    16097   -11909     
+ Misses      13926    10097    -3829     
+ Partials      103        0     -103     

Flag	Coverage Δ
cypress	?
javascript	?
python	61.45% <ø> (-0.71%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
superset/db_engines/hive.py	0.00% <0.00%> (-85.72%)	⬇️
superset/db_engine_specs/hive.py	53.90% <0.00%> (-30.08%)	⬇️
superset/db_engine_specs/presto.py	69.76% <0.00%> (-12.53%)	⬇️
superset/db_engine_specs/mysql.py	79.59% <0.00%> (-12.25%)	⬇️
superset/examples/world_bank.py	97.10% <0.00%> (-2.90%)	⬇️
superset/examples/birth_names.py	96.51% <0.00%> (-2.33%)	⬇️
superset/views/database/mixins.py	80.70% <0.00%> (-1.76%)	⬇️
superset/models/core.py	87.60% <0.00%> (-1.66%)	⬇️
superset/views/core.py	73.77% <0.00%> (-0.49%)	⬇️
superset/connectors/sqla/models.py	90.36% <0.00%> (-0.27%)	⬇️
... and 452 more

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