Update Configuration Documentation for Consumer Configuration Options

[vidit-maheshwari]

Description:
The documentation for consuming messages in Fedora Messaging mentions a special configuration section available for consumers, known as conf-consumer-config. However, upon inspection of the Configuration documentation, it appears that this section is missing or empty.

Link to the documentation section: Consumer Configuration
Link to Configuration documentation section:Configuration documentation

It would be beneficial to update the Configuration documentation to include information about the conf-consumer-config section and provide details about the configuration options available for consumers.