Update rules_python to 0.27.1 (#178)

Necessary after the flip to --incompatible_struct_has_no_methods.

bazelbuild/bazel@8f18d36

WORKSPACE

@@ -2,14 +2,19 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
     name = "rules_python",
-    sha256 = "c03246c11efd49266e8e41e12931090b613e12a59e6f55ba2efd29a7cb8b4258",
-    strip_prefix = "rules_python-0.11.0",
-    url = "https://github.com/bazelbuild/rules_python/archive/refs/tags/0.11.0.tar.gz",
+    sha256 = "e85ae30de33625a63eca7fc40a94fea845e641888e52f32b6beea91e8b1b2793",
+    strip_prefix = "rules_python-0.27.1",
+    url = "https://github.com/bazelbuild/rules_python/releases/download/0.27.1/rules_python-0.27.1.tar.gz",
 )
 
-load("@rules_python//python:pip.bzl", "pip_install")
+load("@rules_python//python:repositories.bzl", "py_repositories")
+
+py_repositories()
+
+load("@rules_python//python:pip.bzl", "pip_parse")
 load("@rules_python//python:repositories.bzl", "python_register_toolchains")
 
+
 # Use a hermetic Python interpreter so that builds are reproducible
 # irrespective of the Python version available on the host machine.
 python_register_toolchains(
@@ -20,8 +25,12 @@ python_register_toolchains(
 load("@python3_10//:defs.bzl", "interpreter")
 
 # Translate requirements.txt into a @third_party external repository.
-pip_install(
+pip_parse(
     name = "third_party",
     python_interpreter_target = interpreter,
-    requirements = "//third_party:requirements.txt",
+    requirements_lock = "//third_party:requirements.txt",
 )
+
+load("@third_party//:requirements.bzl", "install_deps")
+#
+install_deps()