lpcraft fails to pass output files between jobs

[Dan Ryan]

I have recently been attempting to get lpcraft to perform a build and pass its build output to a new job using the `input` section. However, I am unable to successfully run this command. Instead, the `build` stage runs, and then I see the following error:

```
$ lpcraft run --clean --output out
....<snipped>...
Requested input from 'build', but more than one job with that name was previously executed and produced output artifacts.
Full execution log: '/home/techalchemy/.cache/lpcraft/log/lpcraft-20220812-130742.450361.log'
```

In addition to the above error, this also leaves the lxd container around, despite running lpcraft with `--clean`:

$ lxc list --project lpcraft
+---------------------------------------------+---------+------+------+-----------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
+---------------------------------------------+---------+------+------+-----------+-----------+
| lpcraft-huggingface-hub-7152020-focal-amd64 | STOPPED | | | CONTAINER | 0 |
+---------------------------------------------+---------+------+------+-----------+-----------+

If I delete the container, the problem simply occurs again and the container does not get deleted.

Here is the `.launchpad.yaml` I am using:

jobs:
  build:
    series: focal
    architectures: amd64
    environment:
      TOX_TESTENV_PASSENV: http_proxy https_proxy PIP_EXTRA_INDEX_URL
      no_proxy: localhost
    output:
      paths:
      - dist/*.whl
      - dist/*.tar.gz
    packages:
    - python3-dev
    - python3-pip
    - python3-venv
    - git
    - ffmpeg
    run: |-
      python3 -m pip install --user --upgrade --upgrade-strategy=eager pip setuptools build
      python3 -m build .
  test:
    series: focal
    architectures: amd64
    environment:
      TOX_TESTENV_PASSENV: http_proxy https_proxy PIP_EXTRA_INDEX_URL
      no_proxy: localhost
    input:
      job-name: build
      target-directory: build_artifacts
    packages:
    - python3-dev
    - python3-pip
    - python3-venv
    - git
    - git-lfs # Tests
    run: |-
      export PIP_EXTRA_INDEX_URL="https://pypi.org/simple" && python3 -m pip install pytest build_artifacts/files/dist/*.tar.gz
      # First test seems to be inconsistent + second is deprecated"
      python3 -m pytest -sv ./tests/
pipeline:
- build
- test

[Jürgen Gmach (jugmac00)]

Cannot reproduce the issue on my setup.

I do experience another issue as soon as I use the `clean` flag, see https://bugs.launchpad.net/lpcraft/+bug/1986374

Dan mentioned he is rebasing Colin's release command branch onto main.

[Jürgen Gmach (jugmac00)]

The reason for the failure was a leftover in the `/out` folder which still used the old way of storing things, ie release specific, which resulted in two artifacts instead of the allowed one -> exception.

```
>>> source_jobs

[PosixPath('out/build/0'), PosixPath('out/build/focal')]
```