Show queues_dir_path on failed create

[dholroyd]

Description

I needed to look at the code to work out that I had bad permissions on qwdata.

How was this PR tested?

Before,

thread 'main' panicked at /projects/quickwit/quickwit/quickwit-ingest/src/queue.rs:44:58:
called `Result::unwrap()` on an `Err` value: Os { code: 13, kind: PermissionDenied, message: "Permission denied" }

After,

✘ command failed: failed to start ingest v1 service

Caused by:
    0: failed to open the ingest API record log located at `/noperm/qwdata/queues`
    1: io error failed to create WAL directory `/noperm/qwdata/queues`: Permission denied (os error 13)

[CLAassistant]

All committers have signed the CLA.

[guilload]

Arf, that unwrap was unfortunate... Please pick up my suggestion (you may have to fix the formatting (make fix), and I'll approve the PR.

[fulmicoton]

@dholroyd thank you for catching this!