fix: import dashboard stale filter_scopes

[betodealmeida]

SUMMARY

Max found a bug when importing a dashboard that had a stale filter_scope (pointing to a chart that was removed). This PR fixes it, allowing the dashboard to be imported.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A

TESTING INSTRUCTIONS

Added unit test covering the regression.

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 #17741 (12b0e15) into master (fceabf6) will increase coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #17741      +/-   ##
==========================================
+ Coverage   68.07%   68.13%   +0.06%     
==========================================
  Files        1653     1653              
  Lines       66374    66374              
  Branches     7121     7121              
==========================================
+ Hits        45181    45223      +42     
+ Misses      19296    19254      -42     
  Partials     1897     1897              

Flag	Coverage Δ
hive	81.78% <ø> (ø)
mysql	82.15% <ø> (ø)
postgres	82.20% <ø> (ø)
presto	82.06% <ø> (?)
python	82.69% <ø> (+0.14%)	⬆️
sqlite	81.88% <ø> (ø)

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

Impacted Files	Coverage Δ
superset/dashboards/commands/importers/v1/utils.py	81.42% <ø> (ø)
superset/models/core.py	90.00% <0.00%> (+0.73%)	⬆️
superset/connectors/sqla/models.py	88.42% <0.00%> (+1.34%)	⬆️
superset/db_engine_specs/presto.py	89.97% <0.00%> (+5.63%)	⬆️

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[villebro]

LGTM