Support build on multiple bases in our charms

[rgildein]

We need to start using build-on with multiple bases, so instead of building on one base and define runs on multiple. E.g.

- build-on:
    - name: ubuntu
      channel: "22.04"
      architectures: ["arm64"]
    run-on:
      - name: ubuntu
        channel: "24.04"
        architectures:
          - arm64
      - name: ubuntu
        channel: "22.04"
        architectures:
          - arm64
      - name: ubuntu
        channel: "20.04"
        architectures:
          - arm64

should be defined like this

- build-on:
    - name: ubuntu
      channel: "24.04"
      architectures: ["arm64"]
    run-on:
      - name: ubuntu
        channel: "24.04"
        architectures:
          - arm64

- build-on:
    - name: ubuntu
      channel: "22.04"
      architectures: ["arm64"]
    run-on:
      - name: ubuntu
        channel: "22.04"
        architectures:
          - arm64

- build-on:
    - name: ubuntu
      channel: "20.04"
      architectures: ["arm64"]
    run-on:
      - name: ubuntu
        channel: "20.04"
        architectures:
          - arm64

This is related to multiple charms and we need to define which will be effected.

Acceptance Criteria

• Defined list of charms, which needs to support it
• Align our functional test to be able to run with proper charm file, since charmcraft pack will be produce multiple charm files.
• Align our release to be able to release multiple charm files.

[syncronize-issues-to-jira[bot]]

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/SOLENG-847.

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