Remove explicit heights on form elements

[MartijnCuppens]

Input heights were initially added in #26820 to fix #18842. Select heights were added to fix https://bugzilla.mozilla.org/show_bug.cgi?id=1560824.

But:

• The additional height in Form control heights #26820 was caused by pseudo elements, something I fixed in Fix pseudo paddings and height #30269.
• In the meantime the select issue in FF is changed when you explicitly set the line height (https://bugzilla.mozilla.org/show_bug.cgi?id=1560824#c14), making setting the height redundant

However, removing the explicit height would reintroduce #23307. Luckily, date inputs have a ::-webkit-datetime-edit of which we can set the height in em 🎉

This means, we can safely remove those (min-)heights that seem to cause some issues like #26820 (comment) or #31955 (comment) (this fixes issues when zoomed in/out)

I've kept a min-height for textareas, to keep support for #29124

I didn't apply this change to .form-file, since this will introduce conflicts with #31955, therefor I'll keep this in draft.

[mdo]

Hell. Yes.

[MartijnCuppens]

Don't merge this yet, I'm doing some tests withs input field heights to confirm this works (already found a bug in the current implementation which was solved in this PR, lol)

[MartijnCuppens]

Ok, I made a codepen to check browsers with and it looks like we're ok with this change: https://codepen.io/MartijnCuppens/pen/JjKpbGd?editors=1010

I actually even found out there's a bug with the current implementation: https://codepen.io/MartijnCuppens/pen/PozQbqJ?editors=1010

[patrickhlauke]

i think this change now made <input type="color"> revert to its odd/small size - see for instance https://deploy-preview-32020--twbs-bootstrap.netlify.app/docs/5.0/forms/form-control/#color (from my other PR)