fix(bazel): use Label() for deps in py_itf_unittest

String labels in legacy macros resolve in the caller's repo
context, making @itf_pip invisible to downstream consumers.
Label() resolves in the defining module's context instead.

Author: clanghans

bazel/py_itf_unittest.bzl

@@ -44,7 +44,7 @@ def py_itf_unittest(name, srcs, deps = [], data = [], env = {}, pytest_config =
             "--show-capture=no",
             "--junitxml=$$XML_OUTPUT_FILE",
         ] + ["$(location %s)" % x for x in srcs],
-        deps = ["@score_itf//:itf", "@itf_pip//pytest_mock"] + deps,
+        deps = [Label("@score_itf//:itf"), Label("@itf_pip//pytest_mock")] + deps,
         data = [pytest_config] + data,
         env = {"PYTHONDONOTWRITEBYTECODE": "1"} | env,
         **kwargs