fix(onchange callback): change sending event instead of value

[karelhala]

Description

Users are unable to type anything in TextInputs, this PR fixes it by passing correct values to onChange callback.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 89.36%. Comparing base (4e20e52) to head (749c05e).
Report is 2 commits behind head on master.

Files	Patch %	Lines
...escript/src/components/Formik/Patternfly/Common.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #95   +/-   ##
=======================================
  Coverage   89.36%   89.36%           
=======================================
  Files          60       60           
  Lines         959      959           
  Branches      181      181           
=======================================
  Hits          857      857           
  Misses        102      102           

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