[feature]: OAuth 2.0 connection for Liferay component

### Tell us about the problem you're trying to solve

Liferay component currently supports authentication methods such as Basic Authentication, API Keys and Bearer Tokens, but it does not support OAuth 2.0 authorization.

### Describe the solution you’d like

Add OAuth 2.0 as a supported connection type in the Liferay component. Ideally, the component would support standard OAuth 2.0 flows and automatically handle token acquisition and refresh through ByteChef's connection framework.

### Describe the alternative you’ve considered or used

Currently, the workaround is to:

- Create an OAuth 2.0 application in Liferay.
- Manually generate an access token.
- Configure the ByteChef connection using a Bearer Token.

### Additional context

_No response_

The issue names no files or tests. Start by locating the Liferay component's existing Basic Authentication, API Key, and Bearer Token connection definitions, then read the ByteChef connection framework's conventions for OAuth token acquisition and refresh. Done means OAuth 2.0 is available as a Liferay connection type and its tokens are acquired and refreshed automatically.

Written by the indexing model from the issue text.