Issue 31249 update license information

[wezell]

This pull request includes significant changes to the licensing information across multiple files in the dotCMS project. The primary focus is updating the license from the dotCMS Enterprise License to the Business Source License (BUSL-1.1) and adding new fields to certain methods.

Licensing Updates:

• Updated license information to the Business Source License (BUSL-1.1) in AuthPipeProxy.java, BaseAuthenticator.java, ClusterUtil.java, ClusterUtilProxy.java, DashboardProxy.java, ESSeachAPI.java, and FormAJAXProxy.java. [1] [2] [3] [4] [5] [6] [7]

Method Enhancements:

• Added the key field to the getNodeInfo method in ClusterUtil.java to include the server key in the node information.
• Added the key field to the createFailedJson method in ClusterUtil.java to include the server key in the failed JSON response.

File Removal:

• Removed the LICENSE file from the dotCMS/src/enterprise directory as part of the license update.

This PR fixes: #31249