Change all loads of bzl_library to have the absolute repository

@bazel_skylib. This works around not having flipped the
--incompatible_remap_main_repo flag. If that gets done
we can unwind this change.

The exact problem we are working around is namespace resolution
for providers which are global. Without the main repo remapping,
we see the equivalent of '//StarlarkLibraryInfo' from within
this library, but Stardoc sees '@bazel_skylib//StarlarkLibraryInfo'.

bazelbuild/bazel#3115
bazelbuild/bazel#7130

BUILD

@@ -1,4 +1,4 @@
-load("//:bzl_library.bzl", "bzl_library")
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 
 licenses(["notice"])  # Apache 2.0
 

WORKSPACE

@@ -1,7 +1,9 @@
 workspace(name = "bazel_skylib")
 
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-http_archive(
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+maybe(
+    http_archive,
     name = "bazel_federation",
     url = "https://github.com/bazelbuild/bazel-federation/archive/130c84ec6d60f31b711400e8445a8d0d4a2b5de8.zip",
     sha256 = "9d4fdf7cc533af0b50f7dd8e58bea85df3b4454b7ae00056d7090eb98e3515cc",
@@ -10,21 +12,18 @@ http_archive(
 )
 
 load("@bazel_federation//:repositories.bzl", "bazel_skylib_deps")
-
 bazel_skylib_deps()
 
 load("@bazel_federation//setup:bazel_skylib.bzl", "bazel_skylib_setup")
-
 bazel_skylib_setup()
 
+
 # Below this line is for documentation generation only,
 # and should thus not be included by dependencies on
 # bazel-skylib.
 
 load("//:internal_deps.bzl", "bazel_skylib_internal_deps")
-
 bazel_skylib_internal_deps()
 
 load("//:internal_setup.bzl", "bazel_skylib_internal_setup")
-
 bazel_skylib_internal_setup()

lib/BUILD

@@ -1,4 +1,4 @@
-load("//:bzl_library.bzl", "bzl_library")
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 
 licenses(["notice"])
 

rules/BUILD

@@ -1,4 +1,4 @@
-load("//:bzl_library.bzl", "bzl_library")
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 
 licenses(["notice"])
 

rules/private/BUILD

@@ -1,4 +1,4 @@
-load("//:bzl_library.bzl", "bzl_library")
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 
 licenses(["notice"])
 

tests/BUILD

@@ -1,4 +1,4 @@
-load("//:bzl_library.bzl", "bzl_library")
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 load(":build_test_tests.bzl", "build_test_test_suite")
 load(":collections_tests.bzl", "collections_test_suite")
 load(":dicts_tests.bzl", "dicts_test_suite")