Adds support for SPFx v1.22.0-rc.0. Closes #6974

[waldekmastykarz]

Adds support for SPFx v1.22.0-rc.0. Closes #6974

[Adam-it]

@waldekmastykarz Amazing work so far 👏
We are on the right track, but I noticed a few things we need to sort out before we proceed.

[Adam-it]

@waldekmastykarz in general I think it is ok. Just wanted to recheck with you one last thing before we merge

So when testing this change, I created a fresh new SPFx 1.22 webpart and in the yo-rc.json I only manually changed the version from 1.22-rc0 to 1.21.0, and then I ran m365 spfx project upgrade --preview.
I expected I would just get a single guide to update the version in the yo-rc file but as a result I got this

and this is a bit strange IMO
if we look for the test 1.22-rc0 webpart project package.json
src/m365/spfx/commands/project/test-projects/spfx-1220-rc.0-webpart-react/package.json

1. It, by default, does not have a dependency to @microsoft/[email protected] so why should we add it now?
2. also the command outputs to install [email protected] and [email protected] but we do have them but with just ~ before the version. This might be very confusing.
3. also it suggest to install @microsoft/[email protected] I think this is a bug

could we recheck the above before we proceed