Fix the usage between the base workspace manager and the cloned workspace manager

[nipunayf]

Purpose

$title as this causes a breakage in the didChange API when a new file is created.

I went through the original changes in ballerina-platform/ballerina-lang#42911, and they seem invalid for two reasons:

1. This was done as a fix for the data mapper, and the current data mapper does not use this.
2. The change doesn't make sense. It allows a change event without an open event occurring first.

Ideally, this should be fixed along with wso2/product-ballerina-integrator#1488. But for now, I made the changes compliant with the new expression editor service.

Fixes wso2/product-ballerina-integrator#1604

[Copilot]

Pull Request Overview

This PR fixes the incorrect routing of workspace manager calls between the base and cloned workspace managers based on URI schemes. The previous implementation allowed didChange events to be processed by the cloned workspace manager without a corresponding didOpen event, causing breakage when creating new files.

Key changes:

• Corrected the conditional logic to route didOpen calls appropriately between base and cloned workspace managers
• Fixed didChange to only route to the cloned workspace manager for expression scheme URIs
• Aligned didClose to use consistent if-else structure instead of early return

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