Usages of platform_transition_binary prevent usage of $(location)

Because of https://github.com/bazel-contrib/bazel-lib/blame/1e953e4764c01bd6743cc85ae4c15bf9edb05f82/lib/transitions.bzl#L82 the output returns multiple files preventing the use of the $(location) macros: `$(location) expression expands to more than one file`

Start by inspecting lib/transitions.bzl at the referenced line and the behavior of platform_transition_binary around output files. Reproduce the $(location) expansion failure with a focused Bazel example, then verify that the relevant output can be used without expanding to multiple files.

Written by the indexing model from the issue text.