Fix potential infinite loop with no error when using recursive makedirs

[theredcat]

What does this PR do?

Fix an infinite loop in the file.makedirs function. If you provide a relative path with a trailing / (e.g. : file.makedirs mydir/), it will result in an infinite loop since the first loop will return "mydir" and os.path.dirname("mydir") will return an empty string, which is not a directory that can exists.

I ran into this passing a relative path to archive.extracted state, which add a / to the path if it's not present, but the behavior is the same when calling the module directly

What issues does this PR fix or reference?

Maybe #34478 ?

Previous Behavior

Infinite loop when calling file.makedirs with a relative path which have a trailing path

New Behavior

Throw an error when an infinite loop is detected

Tests written?

No

[cachedout]

Oooh, nice catch here! Thanks very much @theredcat . Well done!

[theredcat]

You're welcome :)