[Bug] Wrong regex for extracting latencies

[Azuresonance]

The regex in read_write_data.py for extracting GPU latency and end to end time is wrong.
The (\d+\.\d+) group, which is used to match the latency numbers, will fail if the GPU latency is a whole number--like 3ms. This regex assumes that the fractional part is mandatory, while trtexec can sometimes output whole numbers.

This bug is not very observable, since the code would simply ignore the problematic line, and yield an average latency using slightly less data.