WorkerActivitiesPerSecond does not work

[sokada1221]

Describe the bug
Setting workerActivitiesPerSecond via setWorkerActivitiesPerSecond() does not perform any rate limiting.

To Reproduce
Is the issue reproducible?

• Yes

Steps to reproduce the behavior:

1. Write and run a workflow with rate limited Activity worker via setWorkerActivitiesPerSecond()
2. No rate limiting is performed at worker-level.

Expected behavior
WorkerActivitiesPerSecond to work according to the documentation.

Screenshots
N/A

Additional context
N/A

[sokada1221]

Root cause:
Took a quick look at Worker implementation. Seems like workerActivitiesPerSecond isn't used anywhere i.e. missing the implementation.

Will work on the missing implementation.