Add jest test generator

[jschuler]

What: Closes #3508

[patternfly-build]

PF3 preview: https://patternfly-react-pr-3828-pf3.surge.sh
PF4 preview: https://patternfly-react-pr-3828.surge.sh
A11y report: https://patternfly-react-pr-3828-coverage.surge.sh

[codecov-io]

Codecov Report

Merging #3828 into master will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3828      +/-   ##
==========================================
+ Coverage      71%   71.05%   +0.05%     
==========================================
  Files         785      785              
  Lines       10638    10638              
  Branches     2314     2314              
==========================================
+ Hits         7553     7559       +6     
+ Misses       2655     2654       -1     
+ Partials      430      425       -5

Flag	Coverage Δ
#misc	95.45% <ø> (ø)	⬆️
#patternfly3	85.89% <ø> (ø)	⬆️
#patternfly4	60.11% <ø> (+0.09%)	⬆️

Impacted Files	Coverage Δ
...ct-core/src/components/DataToolbar/DataToolbar.tsx	82.85% <0%> (+14.28%)	⬆️
...mponents/OverflowMenu/OverflowMenuDropdownItem.tsx	50% <0%> (+25%)	⬆️

---

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[ddonahue007]

LGTM

[evwilkin]

LGTM

[patternfly-build]

Your changes have been released in:

• @patternfly/react-catalog-view-extension@1.4.15
• @patternfly/react-core@3.141.3
• @patternfly/react-docs@4.20.17
• @patternfly/react-inline-edit-extension@2.17.15
• demo-app-ts@3.25.3
• @patternfly/react-table@2.27.15
• @patternfly/react-topology@2.14.15
• @patternfly/react-virtualized-extension@1.4.16

Thanks for your contribution! 🎉

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.05%. Comparing base (7b461c0) to head (a4c7fd4).
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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3828      +/-   ##
==========================================
+ Coverage   71.00%   71.05%   +0.05%     
==========================================
  Files         785      785              
  Lines       10638    10638              
  Branches     2314     2314              
==========================================
+ Hits         7553     7559       +6     
+ Misses       2655     2654       -1     
+ Partials      430      425       -5     

Flag	Coverage Δ
misc	95.45% <ø> (ø)
patternfly3	85.89% <ø> (ø)
patternfly4	60.11% <ø> (+0.09%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.
see 2 files with indirect coverage changes

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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