feat: add header tooltip

[khtruong]

CATEGORY

Choose one

• Bug Fix
• Enhancement (new features, refinement)
• Refactor
• Add tests
• Build / Development Environment
• Documentation

SUMMARY

Long header titles are elided. To help users see the full header title, tooltips have been added.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TEST PLAN

Tested manually

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

REVIEWERS

@betodealmeida @DiggidyDave @xtinec @datability-io

[codecov-io]

Codecov Report

Merging #7497 into lyft-release-sp8 will increase coverage by 0.06%.
The diff coverage is 50%.

@@                 Coverage Diff                 @@
##           lyft-release-sp8   #7497      +/-   ##
===================================================
+ Coverage             65.13%   65.2%   +0.06%     
===================================================
  Files                   435     435              
  Lines                 21414   21414              
  Branches               2361    2361              
===================================================
+ Hits                  13948   13962      +14     
+ Misses                 7346    7332      -14     
  Partials                120     120

Impacted Files	Coverage Δ
...src/components/FilterableTable/FilterableTable.jsx	91.01% <50%> (ø)	⬆️
superset/views/core.py	72.99% <0%> (+0.2%)	⬆️
superset/models/core.py	83.46% <0%> (+0.45%)	⬆️
superset/db_engine_specs.py	61.47% <0%> (+0.87%)	⬆️

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[khtruong]

Opened new PR #7531 because these changes need to be checked into lyft-develop now.