kola: add board->arch mapping for Hetzner

[apricote]

Fix kolet binary architecture on Hetzner

Add a mapping for hetzner platform so the right kolet binary is uploaded.

Without this, kola would always upload the amd64 kolet, even for arm64 tests.

This failed with:

bash: line 1: ./kolet: cannot execute binary file: Exec format error

How to use

See flatcar/scripts#2142 for usage.

Testing done

Tested it locally with (only important flags):

bin/kola --board="arm64-usr" --platform hetzner --hetzner-server-type cax11 run cl.basic

Which failed without these changes and succeeds now.

• Changelog entries added in the respective changelog/ directory (user-facing change, bug fix, security fix, update)
• Inspected CI output for image differences: /boot and /usr size, packages, list files for any missing binaries, kernel modules, config files, kernel modules, etc.

[apricote]

I do not really understand the purpose of the architecture function. Maybe this can be removed altogether?

[tormath1]

I do not really understand the purpose of the architecture function. Maybe this can be removed altogether?

Thanks - looks like I forgot this for Scaleway too 🤷 I'll investigate to understand "why" this function but I think we should remove the bounding between the platform and the tested board (i.e all the <platform>Options.Board should be dropped in favor of a generic one)

[apricote]

(i.e all the Options.Board should be dropped in favor of a generic one)

That is already the generic field from Options.Board that just get embedded in the platform options.

[tormath1]

(i.e all the Options.Board should be dropped in favor of a generic one)

That is already the generic field from Options.Board that just get embedded in the platform options.

Yeah - it looks like I already played with those part: 407bc17