Updating SDK and compiler versions to RC1

[joperezr]

This will update repos to use RC1 SDK and RC1 compilers for .NET 7. This is needed given the dotnet/runtime repo will now start to depend on these versions after dotnet/runtime#74822 goes in, so all upstack repos will need to get updated in order to get the dependency to flow.

cc: @mmitche @jaredpar @jkoritzinsky

[jkoritzinsky]

Does Arcade merge-forward from the release branches to main, or do we need to put out a second PR for the main branch (as we should make this change there as well)?

Other than that, LGTM!

[jaredpar]

Should coordinate with @cston to make sure this has the RefSafeyRulesAttribute work

[ViktorHofer]

Does Arcade merge-forward from the release branches to main, or do we need to put out a second PR for the main branch (as we should make this change there as well)?

Does not afaik. We probably need another PR targeting main.

[cston]

Should coordinate with @cston to make sure this has the RefSafeyRulesAttribute work

Please use Roslyn compiler build 4.4.0-3.22431.10 or later to include RefSafetyRulesAttribute support. Thanks.

[cston]

Please use Roslyn compiler build 4.4.0-3.22431.10 or later to include RefSafetyRulesAttribute support.

It looks like that compiler change is not included in RC1 after all. Please feel free to proceed with the RC1 compiler instead.

[jkoritzinsky]

Let’s make sure to open a PR against main with the same changes.

[MattGal]

@mmitche looks like this broke arcade-validation (https://github.com/dotnet/arcade-validation/pull/3357/checks?check_run_id=8240794806) due to something with the SDK version update, I'm taking a look.

[MattGal]

I think I see the problem and will push a commit to the validation pR

[joperezr]

Let’s make sure to open a PR against main with the same changes.

Will do. I'll take care of this as soon as I'm done with propagating it in 7.0