Make methodModelingView match the naming of other flags

[robertbrignull]

Renames the codeQL.modelEditor.methodModelingView feature flag to codeQL.model.methodModelingView so that it matches the prefix of the other modeling feature flags.

I'm guessing what happened is we were trying to preempt the change in #2766, but then we changed our mind to use codeQL.model instead of codeQL.modelEditor, so the codeQL.modelEditor.methodModelingView doesn't match the other flags now.

Checklist

• CHANGELOG.md has been updated to incorporate all user visible changes made by this pull request.
• Issues have been created for any UI or other user-facing changes made by this pull request.
• [Maintainers only] If this pull request makes user-facing changes that require documentation changes, open a corresponding docs pull request in the github/codeql repo and add the ready-for-doc-review label there.

[charisk]

I'm happy either way but if we're going ahead with this we'll want to update the internal docs too.

[robertbrignull]

I think go for it because it's a bit incongruous having one with a different prefix

@norascheuch, you'll have to update your local feature flags.