Fix $(location) references to data attribute

[aherrmann]

The following kind of $(location) expansion failed with an "expression is not a declared prerequisite of this rule" error.

haskell_library(
    ...
    data = ["//some/genrule:target"],
    compiler_flags = ["-DSOME_DEF=$(rootpath //some/genrule:target)"],
)

The reason is that since #959 expand_location was called multiple times, iterating over all relevant attributes. However, expand_location fails immediately if any reference cannot be resolved. This issue didn't come up so far, because certain attributes (e.g. tools) are always included implicitly. However, data is not.

This PR changes the code to instead deduplicate the list of targets and call expand_location only once. This PR also modifies //tests/binary-with-data to serve as a regression test for this issue.

[aherrmann]

CI was failing on Windows and Linux bindist because //tools/runfiles depended on @stackage. We only need core-packages, so pulling those in via haskell_toolchain_library instead should fix the issue.