fix: ensure validation if we skip checkbox value setting #3927

[logaretm]

What

Fixes #3927 by triggering validation if it should before we skip the value setting aspect of checkboxes.

This issue was caused by the input event being triggered before change event as we try not to toggle the value twice. By mistake, we also avoided validating the value when the change event occurred.

This happens in default settings where change event triggers validation while the input event does not.

[codecov-commenter]

Codecov Report

Merging #3930 (c12ef9a) into main (cdaf22d) will decrease coverage by 0.04%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #3930      +/-   ##
==========================================
- Coverage   96.70%   96.66%   -0.05%     
==========================================
  Files          68       68              
  Lines        1945     1947       +2     
  Branches      484      485       +1     
==========================================
+ Hits         1881     1882       +1     
- Misses         64       65       +1     

Impacted Files	Coverage Δ
packages/vee-validate/src/useField.ts	98.44% <50.00%> (-0.51%)	⬇️

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