Extract outer symbols from lambda expressions

[sopel39]

## General
* Fix query failures when complex symbols are referenced from within lambda expression. ({issue}`issuenumber`)

[martint]

Have you found a query that fails due to this? If so, can you add a test with it?

[sopel39]

Have you found a query that fails due to this? If so, can you add a test with it?

Maybe something like InlineProjections, where it now works for:

y := transform(array, x -> x + i)
|
array := ...
i := j * 2

but I'm not sure it should actually inline in that case event though i is referenced once...

[sopel39]

added test