zippy,platform-checks: Clean up Process Orchestrator metadata on restart

In order to work around MaterializeInc#15725, clean up the Progress Orchestrator
information on PIDs and TCP ports on restart. As the tests are running
in containers, the processes that may have held those PIDs and ports
are now gone anyway when environmentd restarts, as they lived in
the same container.

Relates to #MaterializeInc#15725, MaterializeInc#15155

misc/python/materialize/checks/mzcompose_actions.py

@@ -46,6 +46,14 @@ def execute(self, e: Executor) -> None:
         mz = Materialized(image=image, options=StartMz.DEFAULT_MZ_OPTIONS)
 
         with c.override(mz):
+            # Work around https://github.com/MaterializeInc/materialize/issues/15725
+            # by cleaning up Process Orchestrator metadata on restart
+            c.run(
+                "materialized",
+                "-c",
+                "rm -rf /mzdata/*.pid /mzdata/*.ports",
+                entrypoint="bash",
+            )
             c.up("materialized")
 
         c.wait_for_materialized()

misc/python/materialize/mzcompose/__init__.py

@@ -467,6 +467,7 @@ def run(
         env_extra: Dict[str, str] = {},
         capture: bool = False,
         stdin: Optional[str] = None,
+        entrypoint: Optional[str] = None,
     ) -> subprocess.CompletedProcess:
         """Run a one-off command in a service.
 
@@ -490,6 +491,7 @@ def run(
         self.invoke("up", "--detach", "--scale", f"{service}=0", service)
         return self.invoke(
             "run",
+            *(["--entrypoint", entrypoint] if entrypoint else []),
             *(f"-e{k}={v}" for k, v in env_extra.items()),
             *(["--detach"] if detach else []),
             *(["--rm"] if rm else []),

misc/python/materialize/zippy/mz_actions.py

@@ -19,6 +19,15 @@ class MzStart(Action):
     """Starts a Mz instance (all components are running in the same container)."""
 
     def run(self, c: Composition) -> None:
+        # Work around https://github.com/MaterializeInc/materialize/issues/15725
+        # by cleaning up Process Orchestrator metadata on restart
+        c.run(
+            "materialized",
+            "-c",
+            "rm -rf /mzdata/*.pid /mzdata/*.ports",
+            entrypoint="bash",
+        )
+
         c.up("materialized")
         # Loaded Mz environments take a while to start up
         c.wait_for_materialized(timeout_secs=300)