if you run woodpecker-agent on windows and connect it to an docker
daemon, there could be two different platforms possible, as you can
switch from linux to windows mode and visa versa
---
*Sponsored by Kithara Software GmbH*
for normal posix shells we have to add the `-e ` option ... but as there
are more shells out there we have to handle this edgecases on base per
base case.
create a switch case statement in woodpecker should be fine as there is
only a finite number of shells, used in production.
also close #2612
---
*Sponsored by Kithara Software GmbH*
at the moment we compile a script that we can pipe in as single command
this is because of the constrains the docker backend gives us.
so we move it into the docker backend and eventually get rid of it altogether
