[bazel] Convert bitstream workspace rule to the new python ext

This python script ideally requires the jsonschema package.

Signed-off-by: Amaury Pouly <[email protected]>

rules/bitstreams.bzl

@@ -110,7 +110,7 @@ bitstreams_repo = repository_rule(
             default = 18 * 3600,  # Refresh every 18h
         ),
         "python_interpreter": attr.label(
-            default = "@python3_host//:python",
+            default = "@ot_py_for_repo//:python",
             allow_single_file = True,
             doc = "Python interpreter to use.",
         ),

third_party/python/python.MODULE.bazel

@@ -33,6 +33,11 @@ use_repo(pip, "ot_python_deps")
 # List of dependencies that need to used during the loading phase
 # by repository rules.
 REPO_RULES_PIP_DEPS = [
+    # Direct dependencies:
+    "jsonschema",  # In rules/scripts/bitstreams_workspace.py
+    # Transitive dependencies:
+    "attrs",  # For jsonschema
+    "pyrsistent",  # For jsonschema
 ]
 
 # Ask bazel to use all repositories created by rules_python so we