[Form] Fix PHPDoc for builder setData methods
The underlying data variable is typed as mixed whereas the methods
paramers where typed as array.
minor #11934 [Form] Fix PHPDoc for builder setData methods (MisatoTremor)

This PR was merged into the 2.3 branch.

Discussion
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[Form] Fix PHPDoc for builder setData methods

| Q             | A
| ------------- | ---
| Fixed tickets | #11933
| License       | MIT

The underlying data variable is typed as mixed whereas the methods paramers where typed as array.
The method is also described to accept objects, etc. in the documentation.

Commits
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c207d1d [Form] Fix PHPDoc for builder setData methods The underlying data variable is typed as mixed whereas the methods paramers where typed as array.