add loongarch64 support for open-build-service

[zhangwenlong8911]

[adrianschroeter]

pushed minor fixes and a data migration to add the arch.

I am also loonking into the build script, which seems to have incomplete support for loongarch64 atm. Did you build anything successfully using it already? Do you know, if kvm already supported on loonarch64?

[zhangwenlong8911]

pushed minor fixes and a data migration to add the arch.

I am also loonking into the build script, which seems to have incomplete support for loongarch64 atm. Did you build anything successfully using it already? Do you know, if kvm already supported on loonarch64?

I can build with a low version and use it in some projects, such as http://117.78.1.88/project/show/openEuler:22.03:LTS:LoongArch

kvm does not fully support loongarch64, but support work is in progress in an orderly manner, see the mailing list: https://lkml.org/lkml/2023/4/6/1613

[eduardoj]

I rebased the PR on master to get rid of the migration_tests failures, just after #14135 got merged.

[zhangwenlong8911]

@eduardoj Does this pr still need to be revised, please help review the pr if you have time, thank you

[hennevogel]

@adrianschroeter is this good to go (after rebase)?

[zhangwenlong8911]

@eduardoj @adrianschroeter please help review the pr if you have time, thank you