Include type-meaning 'extends' clause in auto-import fix list

[RyanCavanaugh]

If you have something like

// In global or local scope
interface Foo {
}

// User is editing here
class Bar extends Foo { }
//                ~~~
// Cannot extend interface, did you mean implements?

// In another file
export class Foo { }

This error is potentially fixable with an auto-import, so should appear in the list of errors that trigger autoimports

Checked locally

Fixes #59842

[DanielRosenwasser]

Seems right, can you just add a quick test case?