Batch operation rate limit

[stephanos]

What does this PR do?

Documents https://github.com/temporalio/cli/pull/366.

Specifically, the new --rps flag for most batch operations.

Note that although batch-reset is a batch operation, it performs its work locally instead of on the server - so the flag does not apply here.

Notes to reviewers

:warning: The CLI change has been merged but I'll have to release the new CLI version before we can merge this, right?

[stephanos]

FYI I was told to wait with this until the rps feature is released in Server.