run_cmd() and friends: Make args a list[str]

This is a code maintenance commit: some run_xxx() helper functions take a string, some a list, and some just digest all arguments and pass them on as a list to exec() to be executed. That's highly inconsistent. This commit changes that to list-only.
Except for the run_cmd() method of SSHClient, which is still run as a shell method, because, erm, it's a shell. Might be changed in the future for consistency reasons.
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/cmds/projects/CmdBuild.py

@@ -116,7 +116,7 @@ class CmdBuild(Cmd): # export
 
             try:
                 stdout, stderr = await run_cmd(
-                    *make_cmd,
+                    make_cmd,
                     wd=wd,
                     throw=True,
                     verbose=True,