Change default room version to 11. implements MSC4239

[ShadowRZ]

Closes: #18530

Complement test changes: matrix-org/complement#858

SyTest changes: matrix-org/sytest#1422

Pull Request Checklist

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[reivilibre]

Part of #18531

[reivilibre]

looks like this breaks a few tests, sadly; those will need sorting out before merging

[ShadowRZ]

SyTest and Complement also needs to be updated to account for the lack of creator field in m.room.create event in v11 rooms.

[anoadragon453]

SyTest and Complement also needs to be updated to account for the lack of creator field in m.room.create event in v11 rooms.

@ShadowRZ are you able to create PRs for Sytest and Complement to address that? Or would you prefer someone else take that on?

[ShadowRZ]

are you able to create PRs for Sytest and Complement to address that? Or would you prefer someone else take that on?

@anoadragon453 I'd prefer that someone else to take that, as I'm not familar with Perl (for SyTest) / Go (for Complement).

[anoadragon453]

No worries. I've added it to our internal Maintainer queue 🙂