chore(native-filters): Grid units, type guard, feature flag guard

[codyml]

SUMMARY

This PR follows up on a few comments from previous PRs:

• fix(native-filters): Misc spacing fixes for horizontal and horizontal overflow filter bar items #22288 (comment): Replaces use of fractional grid units with full grid units (with almost no visible change)
• fix(dashboard): Fix FilterWithDataMask typing and add null check #22260 (comment): Adds type guard for checking if native filter has a value set and removes now-unnecessary uses of FilterWithDataMask
• fix(dashboard): Force native filters into vertical orientation when FF off #22265: Adds an additional guard if the HORIZONTAL_FILTER_BAR feature flag is off, so Redux state will match behavior

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

No visible changes

TESTING INSTRUCTIONS

• There shouldn't be any new lint/build errors
• Horizontal overflow dividers should look (essentially) the same as before
• If a filter bar is set to horizontal then the feature flag is turned off, checking the Redux state should show filterBarOrientation set to vertical

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags: HORIZONTAL_FILTER_BAR
• 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 #22307 (e46208c) into master (aa97ba4) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #22307      +/-   ##
==========================================
- Coverage   65.59%   65.58%   -0.02%     
==========================================
  Files        1847     1847              
  Lines       70333    70367      +34     
  Branches     7702     7719      +17     
==========================================
+ Hits        46138    46150      +12     
- Misses      22197    22218      +21     
- Partials     1998     1999       +1     

Flag	Coverage Δ
javascript	53.79% <100.00%> (-0.02%)	⬇️

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

Impacted Files	Coverage Δ
superset-frontend/src/dashboard/actions/hydrate.js	1.78% <ø> (ø)
...ilters/FilterBar/FilterControls/FilterControls.tsx	68.62% <ø> (-1.59%)	⬇️
...Filters/FilterBar/FilterControls/FilterDivider.tsx	84.00% <ø> (ø)
...ages/superset-ui-core/src/query/types/Dashboard.ts	100.00% <100.00%> (ø)
...ativeFilters/FilterBar/useFilterControlFactory.tsx	81.81% <100.00%> (ø)
...nd/src/dashboard/components/nativeFilters/state.ts	64.28% <100.00%> (ø)
...t-frontend/src/dashboard/reducers/nativeFilters.ts	40.74% <0.00%> (-3.26%)	⬇️
...t-frontend/src/dashboard/actions/dashboardState.js	52.45% <0.00%> (-0.50%)	⬇️
...veFilters/FilterBar/FilterControls/FilterValue.tsx	6.00% <0.00%> (-0.32%)	⬇️
... and 17 more

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[kgabryje]

LGTM