Renovate updates should manage updates across submodules (OSOE-1190)

[Piedone]

See e.g. this PR: #1165. It fails because .NET consolidation verification fails due to the submodules not using the same Microsoft.NET.Test.Sdk version. Instead, this PR could include submodule updates including the same Microsoft.NET.Test.Sdk version updates.

• This means that we'd have more merges to OSOCE than now if there are both such common package updates and unique ones, but this is not a problem.
• Since we have a common Renovate configuration, probably we can rely on branches being the same. In the example this is renovate/non-breaking-dependency-versions. However, at the point of the OSOCE PR being opened, the submodule PRs might not be ready.
• Can this be done with Renovate configuration? Or maybe we need a GHA implementation.
• This frequently plagues xUnit updates as well.
• This is just for OSOE.
• We need to do this after Create our own .NET SDKs (OSOE-1208) #1190, because that might make this largely unnecessary.

Jira issue