fix(dashboard): Fix hover labels for horizontal overflow native filter dividers

[codyml]

SUMMARY

This PR is based on #22169 and fixes hover labels that weren't appearing for dividers in horizontal native filters overflow dropdown.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

Before:

After:

TESTING INSTRUCTIONS

• Ensure that dividers in the horizontal overflow dropdown show tooltips for titles and descriptions that are truncated.

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

[kgabryje]

LGTM

[kgabryje]

LGTM

[codecov]

Codecov Report

Merging #22210 (a7ec2d2) into master (64939f2) will decrease coverage by 0.01%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master   #22210      +/-   ##
==========================================
- Coverage   66.91%   66.90%   -0.02%     
==========================================
  Files        1839     1839              
  Lines       70079    70084       +5     
  Branches     7636     7638       +2     
==========================================
- Hits        46894    46890       -4     
- Misses      21218    21220       +2     
- Partials     1967     1974       +7     

Flag	Coverage Δ
javascript	53.74% <66.66%> (-0.02%)	⬇️

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

Impacted Files	Coverage Δ
...nd/src/hooks/useTruncation/useCSSTextTruncation.ts	69.23% <55.55%> (-30.77%)	⬇️
...Filters/FilterBar/FilterControls/FilterDivider.tsx	81.48% <100.00%> (-18.52%)	⬇️
...s/legacy-plugin-chart-country-map/src/countries.ts	100.00% <0.00%> (ø)

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