Add monarch_bootstrap (monarch.bootstrap_main) as console script

Summary:
side-note: looks like `monarch.bootstrap_main` used to be `monarch._monarch.hyperactor.bootstrap_main`.

Adds `monarch_bootstrap` as a console script so that it is installed with the monarch wheel. This makes it simpler to pass it as the the `program` (`cmd`) to the process-allocator.

Reviewed By: LucasLLC, colin2328

Differential Revision: D75325523

fbshipit-source-id: af9cb48c0dbeb5b45bdd919c23acc9f05b147ddc

Author: kiukchung

setup.py

@@ -126,6 +126,7 @@ def run(self):
     entry_points={
         "console_scripts": [
             "monarch=monarch.tools.cli:main",
+            "monarch_bootstrap=monarch.bootstrap_main:invoke_main",
         ],
     },
     rust_extensions=[

tools/components/hyperactor.py

@@ -45,7 +45,7 @@ def proc_mesh(
             args=[
                 "mesh-worker",
                 f"--port={port}",
-                "--program=monarch_bootstrap",  # TODO add monarch_boostrap as console_script and install it in Dockerfile
+                "--program=monarch_bootstrap",  # installed with monarch wheel (as console script)
             ],
             num_replicas=mesh.num_hosts,
             resource=specs.resource(h=mesh.host_type),