no compilation flags for version

[seeflood]

What happened:
I just found a problem with version.
Layotto used compilation flags to modify the Version variable in main.go and :

But we removed the flags in new CI , which leads to some issues.
For example, if you run the layotto binary, there's no version information in the printed message:

Besides, the actuator API can't get the right version.

What you expected to happen:
add compilation flags for version

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?: