fix: moved setTrace method to correct class

[hohy]

Moved setTrace method in reflect-config.json into LanguageServer class, where it belongs. Changed how lsp.spec.user1.test.ts so it passes in CI. It seems like it was broken in #2563 as CI pipeline fails for all builds since it was merged.

How Has This Been Tested?

I manually tested the updated binary and I no longer receive the reflection errors.

Checklist:

• [x] Each of my commits contains one meaningful change
• [x] I have performed rebase of my branch on top of the development
• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] I have checked my code and corrected any misspellings

[hohy]

@slavek-kucera ready for review. Thanks!