This updates the Ember edition setting to Octane, which I removed from #8319
because it required the template-only Glimmer components setting to be turned
on, which this does. These changes to templates accommodate that setting.
This is mostly a direct application of the ember-angle-brackets-codemod.
I manually restored newlines in multi-line component invocations, usually
preserving file line length except for now-non-positional link-to @route.
I needed to rename task to taskState in some cases to avoid Ember
Concurrency naming conflicts.
