/usr/bin/beakerlib-test.sh

where this path comes from?

/usr/bin/beakerlib-test.sh

where this path comes from?

It's copied to
/usr/bin like others see main.yml

we shouldn't copy files from to /usr/bin/

These files are not packaged and it might cause conflicts, or unexpected behaviour of a test.

You can use script module instead, it does the same thing internally: copies the script from localhost to the target machine and runs it, but it uses ansible's temporary folders to perform this task, and doesn't interfere with system files.

updated PTAL

Why do use this form of shebang?
It make sense for python but, even now for python it is deprecated and not recommended form.

I would put here some information. Like: purpose of this script, where it is used. Input required/expected values. Output value. Exit code. Files that are produced.

Is there a way to drop relative path? Does Ansible support it?

None I know of

It's nothing doing something new . Just separates from the embedded ansible code. Feel free to suggest.