fix: methods incorrect type and update deprecated targets

[dpgaspar]

SUMMARY

While gradually adding type annotations to FAB, having @expose methods as a List popped up as an error.

ref: https://github.com/dpgaspar/Flask-AppBuilder/blob/master/flask_appbuilder/api/__init__.py#L189

Also updated missing target to deprecation warnings

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #23935 (eae17c9) into master (f1fa1a7) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head eae17c9 differs from pull request most recent head 5c9aa75. Consider uploading reports for the commit 5c9aa75 to get more accurate results

@@           Coverage Diff           @@
##           master   #23935   +/-   ##
=======================================
  Coverage   68.12%   68.12%           
=======================================
  Files        1941     1941           
  Lines       75073    75074    +1     
  Branches     8155     8155           
=======================================
+ Hits        51141    51142    +1     
  Misses      21849    21849           
  Partials     2083     2083           

Flag	Coverage Δ
hive	53.01% <99.47%> (+<0.01%)	⬆️
mysql	78.82% <100.00%> (+<0.01%)	⬆️
postgres	78.89% <100.00%> (+<0.01%)	⬆️
presto	52.92% <99.47%> (+<0.01%)	⬆️
python	82.68% <100.00%> (+<0.01%)	⬆️
sqlite	77.41% <100.00%> (+<0.01%)	⬆️
unit	52.81% <99.47%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
superset/datasource/api.py	100.00% <ø> (ø)
superset/advanced_data_type/api.py	100.00% <100.00%> (ø)
superset/annotation_layers/annotations/api.py	89.31% <100.00%> (ø)
superset/annotation_layers/api.py	86.32% <100.00%> (ø)
superset/async_events/api.py	100.00% <100.00%> (ø)
superset/available_domains/api.py	100.00% <100.00%> (ø)
superset/cachekeys/api.py	96.15% <100.00%> (ø)
superset/charts/api.py	85.71% <100.00%> (ø)
superset/charts/data/api.py	88.95% <100.00%> (ø)
superset/connectors/sqla/views.py	89.71% <100.00%> (ø)
... and 35 more

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[Antonio-RiveroMartnez]

LGTM!