gh-135953: Implement sampling tool under profile.sample (#135998)

Implement a statistical sampling profiler that can profile external
Python processes by PID. Uses the _remote_debugging module and converts
the results to pstats-compatible format for analysis.


Co-authored-by: Pablo Galindo <pablogsal@gmail.com>

Lib/profile/collector.py

@@ -0,0 +1,11 @@
+from abc import ABC, abstractmethod
+
+
+class Collector(ABC):
+    @abstractmethod
+    def collect(self, stack_frames):
+        """Collect profiling data from stack frames."""
+
+    @abstractmethod
+    def export(self, filename):
+        """Export collected data to a file."""