Fix extract method in top level

[CyrusNajmabadi]

Fixes #67647

Followup to #76383

The general idea here is that at the top level:

1. we should not offer extract method, we should offer 'extract local function' in our lightbulb.
2. if the user invokes the command handler, we should try 'extract method' first. If that fails, we should try 'extract local function'. If that produces a better outcome, we use that instead.

[CyrusNajmabadi]

@JoeRobich @ToddGrun @akhera99 ptal.