(build): remove .sh extension from launcher scripts

Description

Remove the shell (.sh) extensions of created targets.

Both build and install targets are impacted.

Adds .bin extension to executable target such as utilities or fwlauncher to distinguish exe from shell scripts

Closes #582 (closed)

How to test it?

Compile any target (test, app, utilities), launch the script from the build, and from the install. Targets should be created in lowercase (ex: guiqttest) and shouldn't contain the .sh extension.