refactor(Jumbotron): Remove Jumbotron component

[phwebi]

• Bug fix
• New feature
• Chore
• Breaking change
• There is an open issue which this change addresses
• I have read the CONTRIBUTING document.
• My commits follow the Git Commit Guidelines
• My code follows the code style of this project.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• My change requires a change to Typescript typings.
  • I have updated the typings accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

The jumbtron and jumbotron-fluid classes have been removed in bootstrap 5. This change emulates a similar style by using the utility classes. The padding is not exactly a 1-to-1 replacement since the jumbotron x and y paddings did not follow the utility classes styling. This PR removes the jumbotron component. This is a breaking change, so we should add instructions on how to mimic a jumbotron in the upgrade documentation. (The old jumbotron class can be replaced with rounded px-3 px-sm-4 py-3 py-sm-5. jumbotron-fluid can be replaced with bg-light mb-4 py-3 py-sm-5)

Related to: #1748

[kyletsang]

I'm in favor of removing this component actually. We should definitely leave an example of how to create the jumbotron in the docs though.

[phwebi]

We kept it in an effort to avoid breaking changes, but if that's not a concern, we can definitely just remove it 👍

[kyletsang]

Feel free to make breaking changes. Now's a good time as any :)