fix(promote action): exclude legacy all architecture in base processing

[jneo8]

Ensure that the legacy all architecture is ignored during promotion to avoid processing legacy or unsupported configurations. This resolves issues with handling bases that use the all architecture.

In the case of legacy charms like sysconfig, the output of charmcraft status sysconfig --format json includes the legacy all architecture. Channels associated with this architecture are not open, making it impossible to release revisions to them.

To address this issue, this change ensures that the all architecture is ignored during the promotion process, preventing unnecessary processing of legacy configurations and ensuring compatibility with modern workflows.

[
    {
        "track": "latest",
        "mappings": [
            {
                "base": {
                    "name": "ubuntu",
                    "channel": "16.04",
                    "architecture": "all"
                },
                "releases": [
                    {
                        "status": "open",
                        "channel": "latest/stable",
                        "version": "6",
                        "revision": 6,
                        "resources": [],
                        "expires_at": null
                    },
                    {
                        "status": "open",
                        "channel": "latest/candidate",
                        "version": "6",
                        "revision": 6,
                        "resources": [],
                        "expires_at": null
                    },
                    {
                        "status": "tracking",
                        "channel": "latest/beta",
                        "version": null,
                        "revision": null,
                        "resources": null,
                        "expires_at": null
                    },
                    {
                        "status": "tracking",
                        "channel": "latest/edge",
                        "version": null,
                        "revision": null,
                        "resources": null,
                        "expires_at": null
                    }
                ]
            },
            ...

[Pjack]

Couple projects are impacted by this issue.

• https://github.com/canonical/charm-nrpe/actions/runs/12578151833
• https://github.com/canonical/charm-logrotated/actions/runs/12578099455

It blocks our release process, please help this. Thanks!

[jneo8]

Hi @simskij or @sed-i,

Could you please take a look at this for me? I’d really appreciate your feedback.

[Pjack]

Hi @simskij or @sed-i ,

Do you have an ETA for the new release that includes this patch? We have several repositories are affected by this issue and we currently have to promote manually. We would appreciate it if this patch could be released soon. Thanks!