feat: add public entry point for PyCcLinkParamsInfo (#1128)

This provides a public entry point for loading the underlying
`PyCcLinkParamsProvider` provider that is built into Bazel. This
provider isn't yet usable from Bazel, but adding a loadable way for it
to migrate off the built-in rules is the first step.

Work towards #1069

python/BUILD.bazel

@@ -79,6 +79,11 @@ bzl_library(
     deps = ["//python/private:reexports_bzl"],
 )
 
+bzl_library(
+    name = "py_cc_link_params_info_bzl",
+    srcs = ["py_cc_link_params_info.bzl"],
+)
+
 bzl_library(
     name = "py_import_bzl",
     srcs = ["py_import.bzl"],

python/py_cc_link_params_info.bzl

@@ -0,0 +1,3 @@
+"""Public entry point for PyCcLinkParamsInfo."""
+
+PyCcLinkParamsInfo = PyCcLinkParamsProvider

tests/BUILD.bazel

@@ -20,6 +20,7 @@ build_test(
         "//python:defs_bzl",
         "//python:proto_bzl",
         "//python:py_binary_bzl",
+        "//python:py_cc_link_params_info_bzl",
         "//python:py_import_bzl",
         "//python:py_info_bzl",
         "//python:py_library_bzl",