Remove all `entityMapping` logic from `HttpProviderPlugin`

[Zorin95670]

Description:

Refactor the HttpProviderPlugin to remove all entityMapping-related logic.

The responsibility of mapping context data to entities is now handled by the dedicated EntityMapperTaskPlugin (emtp). Therefore, HttpProviderPlugin should no longer perform or support any entity mapping.

Requirements:

• Remove all entityMapping configuration handling from HttpProviderPlugin
• Delete any associated mapping logic and utilities within the plugin
• Ensure no residual references to entityMapping remain
• Keep the plugin focused strictly on HTTP communication responsibilities

Expected Behavior:

• HttpProviderPlugin only handles HTTP requests/responses
• Any entity mapping must be performed exclusively by EntityMapperTaskPlugin

Notes:

• Verify backward compatibility or document breaking changes if applicable
• Update related documentation and examples to reflect this change