Feature/An option send bytes through web socket

[YoniGang]

Version info:

2.0.0-28

I would like to have an option to send bytes messages over web sockets load test

[YoniGang]

I'm currently added locally a short solution and wanted to open a pr for this feature

[hassy]

that would be great @YoniGang! would love to see what it looks like

[YoniGang]

Just opened a pr:
#1828