Implement exponential backoff during reconnect

[sokada1221]

Users are reporting noisy warning messages during reconnect as it currently retries every 3 seconds.

{"level":"warn","ts":1749885509.323616,"logger":"gostats.loggingsink","msg":"connection error: dial tcp 10.45.31.218:8225: connect: connection refused","json":{}}

Implementing an exponential backoff with decorrelated jitter to:

1. Improve the retry behavior in general; and
2. Address the noisy reconnect logs

Ref: https://aws.amazon.com/blogs/architecture/exponential-backoff-and-jitter/