fix(amazonq): update lsp client name to support Sagemaker AI origin for agentic chat

[parameja1]

Problem

In order to set appropriate Origin Info on LSP side for SMAI CodeEditor, link, clientInfo needs to be distinct

• related PR to support SMUS

Solution

• To check if the environment is SageMaker and a Unified Studio instance and set corresponding clientInfo Name which is AmazonQ-For-SMUS-CE

Testing

• Built artefact locally using npm run compile && npm run package and tested on a SMAI CE space
• Ran npm run test -w packages/toolkit which succeeded
• LSP logs show the respective client Info details

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be squash-merged at release time.
- Your code changes must meet the guidelines in [CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the Apache 2.0 license.

[amazon-inspector-ohio]

⏳ I'm reviewing this pull request for security vulnerabilities and code quality issues. I'll provide an update when I'm done

[github-actions]

• This pull request implements a feat or fix, so it must include a changelog entry (unless the fix is for an unreleased feature). Review the changelog guidelines.
  • Note: beta or "experiment" features that have active users should announce fixes in the changelog.
  • If this is not a feature or fix, use an appropriate type from the title guidelines. For example, telemetry-only changes should use the telemetry type.

[amazon-inspector-ohio]

✅ I finished the code review, and didn't find any security or code quality issues.