refactor(useFocus): refactor repeated useEffect code

[makafsal]

Closes #6420

What did you change?

Refactored the common useEffect logic into a single claimFocus common method

How did you test and verify your work?

yarn avt
yarn test
storybook

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.63%. Comparing base (1f5b63e) to head (cf72a26).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6459      +/-   ##
==========================================
+ Coverage   79.61%   79.63%   +0.02%     
==========================================
  Files         394      394              
  Lines       12871    12856      -15     
  Branches     4268     4257      -11     
==========================================
- Hits        10247    10238       -9     
+ Misses       2624     2618       -6     

Components	Coverage Δ
ibm-products	∅ <ø> (∅)
ibm-products-web-components	∅ <ø> (∅)