Rename maintainer for Carbon squad owned assets

[aagonzales]

At the moment, we specify which Carbon squad owns which assets. I think we could be more general with our maintainer name as most teams at IBM and outside IBM will not be familiar with out team structure and squad separation.

See the conversation also started here.

[mattrosno]

I believe there's value in showing that a dedicated team (within the Carbon core team) maintains the IBM.com components. That's shown in the catalogs through the team icons:

And then team name and pictogram in detail pages:

If we remove squad distinction and everything here is just "Carbon Team"... we'd no longer use that Carbon IBM.com icon and pictogram, which is maybe okay. If we go forward with this, we should time it with #295 so we can specify who within the Carbon team is maintaining each library.