feat(Template): add props for the tagName

[samouss]

Summary

With the current implementation the <Template> is always wrapped with a <div> element. But in some cases it can lead to incorrect DOM nesting. e.g. When we use the <Template> inside a <label> or a <button> the <div> element is forbidden inside those elements.

By providing a rootTagName props we can specify which element the root will be. In the previous example we can use a <span> since it's a valid child element for <label> & <button>.

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[Haroenv]

Where do you want to use this?

[samouss]

In the next GeoSearch widget there are some templates that are used inside a label or a button so it will be helpful for this widget at least.

[bobylito]

Looks good. And it's just an internal API.