Add trace logger events for Bandwidth toxic

[miry]

Add more log events for Trace level to debug bandwidth toxic issues.

Tophat

Run server

$ LOG_LEVEL=trace ./dist/toxiproxy-server

Create proxy and toxics:

$ ./dist/toxiproxy-cli create -l ":2001" -u "example.com:80" shopify_http
Created new proxy shopify_http

$ ./dist/toxiproxy-cli toxic add --downstream --type=bandwidth --toxicName="bandwidth_downstream1" shopify_http
Added downstream bandwidth toxic 'bandwidth_downstream1' on proxy 'shopify_http'

$ ./dist/toxiproxy-cli toxic add --upstream --type=bandwidth --toxicName="bandwidth_upstream1" shopify_http
Added upstream bandwidth toxic 'bandwidth_upstream1' on proxy 'shopify_http'

Create a connection:

$ nc localhost 2001
GET /

During this time remove a toxic:

$ ./dist/toxiproxy-cli toxic delete --toxicName bandwidth_upstream1 shopify_http
Removed toxic 'bandwidth_upstream1' on proxy 'shopify_http'

Sample server output:

{"level":"trace","component":"BandwidthToxic","method":"Pipe","toxic_type":"bandwidth","addr":"0x140003801c0","caller":"bandwidth.go:52","time":"2022-09-07T10:51:02Z","message":"BandwidthToxic was interrupted during writing data"}
{"level":"trace","component":"BandwidthToxic","method":"Pipe","toxic_type":"bandwidth","addr":"0x140003801c0","caller":"bandwidth.go:52","time":"2022-09-07T10:51:02Z","message":"BandwidthToxic was interrupted during writing data"}