Upgrade pkg workflow from Ploutos v6 to v7.

[ximon18]

A successful run of the upgraded pkg workflow can be seen here:

https://github.com/NLnetLabs/krill/actions/runs/8605626059

Summary of changes in Ploutos since the current v6.3.1 that Krill is using now:

v7.3.0

This release contains the following changes:

• Expose optional extra_cargo_deb_args arg for package_build_rules (https://github.com/NLnetLabs/ploutos/pull/100)

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v7.2.5

This bug fix release contains the following changes:

• FIX: rpmlint: command not found (https://github.com/NLnetLabs/ploutos/issues/98).

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v7.2.4

• Bump actions/github-script from 6 to 7 (https://github.com/NLnetLabs/ploutos/pull/93)
• Bump docker/setup-qemu-action from 2 to 3 (https://github.com/NLnetLabs/ploutos/pull/94)

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v7.2.3

This bug fix release contains the following changes:

• FIX: AttributeError: module 'tarfile' has no attribute xxx (https://github.com/NLnetLabs/ploutos/pull/90)
• Bump docker/setup-buildx-action from 2 to 3 (https://github.com/NLnetLabs/ploutos/pull/87)
• Bump docker/login-action from 2 to 3 (https://github.com/NLnetLabs/ploutos/pull/86)
• Bump docker/build-push-action from 4 to 5 (https://github.com/NLnetLabs/ploutos/pull/85)
• Bump docker/metadata-action from 4 to 5 (https://github.com/NLnetLabs/ploutos/pull/84)

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v7.2.1

This release contains the following changes:

• Wait at most (approximately) 60 seconds for cloud-init to complete in the pkg-test phase, instead of looping forever. (fixes #77)

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v7.1.1

This bug fix release contains the following changes:

• Use ubuntu-22.04 as the GitHub host runner O/S version for all jobs instead of ubuntu-latest for reproducible behaviour (otherwise when ubuntu-latest is updated to point to a newer O/S release something could break) (part of #50).
• Work around error 'The image used by this instance requires a CGroupV1 host system' when testing packages on CentOS 7 or Ubuntu Xenial, introduced in v7.1.0, that happens when using LXD on an ubuntu-22.04 host, by forcing the use of an ubuntu-20.04 host instead (part of #50).

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v7.1.0

This release contains the following changes:

• Adds support for a new runs_on and cross_runs_on workflow input for controlling which type of GitHub runner Ploutos jobs run on (in particular this allows for self-hosted runners to be used).
• Run all jobs on ubuntu-latest rather than a mix of Ubuntu versions (partially related to #50).

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v7.0.1

This bug fix release contains the following changes:

• Upgrade cargo-generate-rpm (#69) from v0.10.1 to v0.10.2 to fix an upstream regression which accidentally dropped support for metadata.generate-rpm.summary in cargo-generate-rpm v0.9.0, which was then inherited by Ploutos v7.0.0.

If you created RPMs using Ploutos prior to v7.0.0 and were using the package.metadata.generate-rpm.summary key in Cargo.toml then Ploutos v7.0.0 would have silently ignored your summary setting. This releases restores the original behaviour.

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v7.0.0

This breaking release contains the following changes:

• Add support for Cargo virtual manifests (#67), including two new Ploutos settings: manifest_dir and workspace_package (see the updated docs for more information)
• Upgraded tools used to versions compatible with Cargo workspaces:
  • Upgrade cargo-deb from 1.38.4 to 1.42.2.
  • Upgrade cargo-generate-rpm from 0.8.0 to 0.10.1.
  • Upgrade toml-cli from 0.2.0 to 0.2.3.