lookupBindGroupOcc: recommend names in the same namespace (#17593)

Previously, `lookupBindGroupOcc`'s error message would recommend all
similar names in scope, regardless of whether they were type
constructors, data constructors, or functions, leading to the
confusion witnessed in #17593. This is easily fixed by only
recommending names in the same namespace, using the
`nameSpacesRelated` function.

Fixes #17593.

(cherry picked from commit c1975fac)