go/types, types2: use orig. compiler error message for a shift error

Slightly better for cases such as string(1 << s).
Leaves type-checker tests alone for now because
there are multiple dozens.

For #45117.

Change-Id: I47b314c713fabe424c2158674bf965416a8a6f5c
Reviewed-on: https://go-review.googlesource.com/c/go/+/379274


Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>