Document constrained input and password input dependencies on configuring cldr

[maier49]

Without installing cldr-data and setting a default locale, these input components display an illegible validation message.

They are leveraging the feature and our i18n docs explain the configuration needed to enable it, but there is no indication to the user that is the reason for the illegible text. Putting something in the docs for these widgets could make that clearer.

[tomdye]

We should certainly look into why this is happening and attempt to fix