[15.4 Retro] review bot for Backports

[nilxam]

• We need a review bot for Backports project, if the change does not exist in Factory then backports review team needs a opened review to decide let it go or not.
• Add devel project review if needed.

[nilxam]

https://github.com/openSUSE/openSUSE-release-tools/pull/2848

then we need to add factory-auto to be reviewer on Backports project, and add it to every pending requests.

[nilxam]

• If source package does exist in SLE, decline the submission Note: release manager can override it by commenting on reviewbot and reopen the request
• Decline the submission if package does not exist in devel-baseproject(eg. openSUSE:Factory) and the source project does not exist in check-source-valid-source-origins attribute. (We might need to keep some package alive perhaps take it from Fork subproject, if we should not delete it in Backports in case that package has been deleted in Factory)
• Add a review-team group review if source project does not exist in check-source-valid-source-origins attribute, IOW every change has not been reviewed in Factory(or from Fork) then backports reviewer need to.
• If submitter is not maintainer adding an additional devel project review

Project attributes in my test project:

check-source-ensure-source-exist-in-baseproject: True
check-source-devel-baseproject: openSUSE:Factory
check-source-allow-source-in-sle: False
check-source-sle-project: SUSE:SLE-15-SP5:GA
check-source-allow-valid-source-origin: True
check-source-valid-source-origins: openSUSE:Leap:15.4:Update openSUSE:Backports:SLE-15-SP4:Update openSUSE:Factory openSUSE:Backports:SLE-15-SP5:SLEFork openSUSE:Backports:SLE-15-SP5:FactoryFork
check-source-add-devel-project-review: True
review-team = origin-reviewers

[nilxam]

Backports checker is up for openSUSE:Backports:SLE-15-SP5!!

Scenarios:

1. FOO submitted from openSUSE:Factory to openSUSE:Backports:SLE-15-SP5

   • New package(Yes): add devel-project review
   • New package(No): no additional review needed, when it passes Factory review would mean passes opensuse-review-team's review

2. FOO submitted from home namespace or any other project than openSUSE:Factory to openSUSE:Backports:SLE-15-SP5

   • If FOO does exist in SLE: decline the submission, Backports maintainer can override it by commenting on the request(eg. @factory-auto override accept then reopen the request)
   • If FOO does not exist in Factory": decline the request and ask submitter to submit it to Factory first
   • If FOO does exist in Factory: add origin-reviewers review

[nilxam]

This is fixed a while ago.