Allow to handle OAuth2 clients in the Web UI Admin Center + improve token management

The goal is to:

• Manage the applications that can be granted access to Nuxeo (Admin > Cloud Services > Consumers > OAuth2 Clients in the JSF UI).
• Better manage the OAuth2 tokens (Admin > Cloud Services > Service Providers Tokens > OAuth2 Tokens in the JSF UI).

In the "Cloud services" tab we should have:

A new Applications pill
Allow CRUD as in the JSF UI.
Should we display the Client Secret?

Rework the existing Tokens pill
Separate the OAuth2 tokens used by the authorized applications (OAuth2 clients) and the cloud accounts (OAuth2 service providers) with different columns for each table, for instance:

Authorized Applications:

• Nuxeo Login
• Application Id
• Creation Date

Cloud Accounts:

• Nuxeo Login
• Service Name
• Service Login
• Creation Date
• Shared Token

In any case, let's be consistent with NXP-22588.

Let's also allow to search a token by user / service name.