feat(backups/mirror): filter backup to be transfered

[fbeauchamp]

Description

• add the possibility to filter VM subject to a mirror job, with an optional property filter on the job
• The filter is either undefined, or a format accepted by value-matcher. For example filtering by vm uuid would be : { vm: { uuid: { __or: ["foo", "bar"] } } } where foo and bar are vm uuids
• for incremental backup, if at least one backup of a job match, all the VM of the job are transferred to ensure we won't break the delta chain
• for full backup only the backup matching the filter are transferred

excluded VM are visible in thebackup execution logs, with a specific information message

Checklist

• Commit
  • Title follows commit conventions
  • Reference the relevant issue (Fixes #007, See xoa-support#42, See https://...)
  • If bug fix, add Introduced by
• Changelog
  • If visible by XOA users, add changelog entry
  • Update "Packages to release" in CHANGELOG.unreleased.md
• PR
  • If UI changes, add screenshots
  • If not finished or not tested, open as Draft