fix(node:worker_threads): ensure threadId property is exposed on worker_threads instance

[jerome-benoit]

What does this PR do?

Add threadId property missing on Worker instance from node:worker_threads module.

• Code changes

How did you verify your code works?

• I ran make js and committed the transpiled changes
• I or my editor ran Prettier on the changed files (or I ran bun fmt)
• I included a test for the new code, or an existing test covers it

[Electroid]

Thanks for working on this!