[13.0][UPD] openupgrade_records: retrocompatibility with upgrade_analysis (v14)

[MiquelRForgeFlow]

If you try to run an analysis with upgrade_analysis comparing v13 and v14, happens that the noupdata computations break because they don't exist in v13.

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[pedrobaeza]

Is this finally ready?

[MiquelRForgeFlow]

Of course. I hope that the problem in #2631 is not related with this code. I haven't had time yet to check #2631 properly.

[pedrobaeza]

Well, I prefer that you check if related before merging.

[StefanRijnhart]

This is a duplicate of #2481, except that one returns XML files and this one returns paths to XML files. Could that be the reason of the corruption in #2631?

[MiquelRForgeFlow]

@StefanRijnhart Sorry, I didn't see you already have a PR doing this. Stupid me. I will close then. This one returns paths because that's what upgrade_analysis module is doing now, see https://github.com/OCA/server-tools/blob/14.0/upgrade_analysis/models/upgrade_record.py#L170. I don't think that's the cause of the corruption of #2631, but I still have pending to check the cause in detail.