Fix servicebus metadata

[danieljurek]

Example failure attempting to publish a package that has publish = false: https://dev.azure.com/azure-sdk/internal/_build/results?buildId=5643808&view=logs&j=b766ebde-1fdb-5f11-1350-46ddc53b23cf&t=7ef29fa0-f532-5653-3473-16dc04608431

Example success building crate where publish = false: https://dev.azure.com/azure-sdk/internal/_build/results?buildId=5643777&view=results

[Copilot]

Pull request overview

This PR fixes a build and test pipeline issue where the servicebus package was being excluded from automation due to having publish = false in its Cargo.toml, causing the pipeline to fail when no publishable packages were found in the service directory.

Key Changes:

• Changed publish = false to publish = true in the servicebus Cargo.toml to make the package discoverable by the build system
• Added defensive error handling in the PowerShell script to log when no publishable packages are found
• Cleaned up trailing whitespace in the PowerShell script

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
sdk/servicebus/azure_messaging_servicebus/Cargo.toml	Changed package from non-publishable to publishable, allowing it to be included in build and test pipelines
eng/scripts/Language-Settings.ps1	Added error logging when no publishable packages are found and removed trailing whitespace