[11.x] Add decrement method to the rate limiter class

[AlexJump24]

I ran into a scenario with a third party API where I was calling their API on a rate limited job. The job was consumed and therefore reduced the rate limit, but I wanted to catch the exception and decrease the rate limit again.

I could get around this by calling RateLimiter::increment(...) and passing it a negative value e.g. -1, but thought it would be a nicer DX to have a decrement method available like in other cache classes.

I have followed the approach for how other cache classes achieve this for consistency.