chore(Alert): Convert examples to functional with typescript

[nicolethoen]

What: Closes #6633

[patternfly-build]

Preview: https://patternfly-react-pr-6634.surge.sh

[gabipodolnikova]

Just one small thing: I see the Async live region alert example with a differently styled buttons than in the other examples. Do you also see it?

[nicolethoen]

@gabipodolnikova yes! That's because it's using a toggleGroup instead of buttons. it is sort of an on/off switch, when the others are buttons... is it distracting? I did update it to use the toggleGroup - I figured it was a good use case but it is unnecessary.

[gabipodolnikova]

@gabipodolnikova yes! That's because it's using a toggleGroup instead of buttons. it is sort of an on/off switch, when the others are buttons... is it distracting? I did update it to use the toggleGroup - I figured it was a good use case but it is unnecessary.

Ah okay, it just surprised me, that it looks different than the others. it is a little bit distracting for me, but maybe get another opinion. Otherwise I am approving this :)