Add -pps argument to influx write CLI

[abalone23]

It would be convenient if the influx 2.0 CLI write command had a -pps argument to throttle points in order to alleviate write rate limit errors.

[sranka]

@abalone23 I am not much familiar with overall clients' POV, but I guess that the rate limits are specified in megabytes per minute. Wouldn't be better to specify --limitRate=number to specify max written megabytes per minute?

The cost of the implementation is the same independently on the chosen units (pps or MB/minute).

[abalone23]

@sranka I based it on the 1.x CLI:

-pps How many points per second the import will allow. By default, pps is zero and influx will not throttle importing. Use with -import.

Your idea for limitRate would be better I agree.