fix(profiling): Always use builtin time.sleep

As pointed out in #1813 (comment),
gevent patches the `time` module and `time.sleep` will only release the GIL if
there no other greenlets ready to run. This ensures that we always use the
builtin `time.sleep` and not the patched version provided by `gevent`.

Author: Zylphrex

sentry_sdk/profiler.py

@@ -118,6 +118,13 @@ def is_module_patched(*args, **kwargs):
         return False
 
 
+try:
+    from gevent.monkey import get_original
+    thread_sleep = get_original("time", "sleep")
+except ImportError:
+    thread_sleep = time.sleep
+
+
 _scheduler = None  # type: Optional[Scheduler]
 
 
@@ -658,7 +665,7 @@ def run(self):
             # not sleep for too long
             elapsed = time.perf_counter() - last
             if elapsed < self.interval:
-                time.sleep(self.interval - elapsed)
+                thread_sleep(self.interval - elapsed)
 
             # after sleeping, make sure to take the current
             # timestamp so we can use it next iteration
@@ -720,7 +727,7 @@ def run(self):
             # not sleep for too long
             elapsed = time.perf_counter() - last
             if elapsed < self.interval:
-                time.sleep(self.interval - elapsed)
+                thread_sleep(self.interval - elapsed)
 
             # after sleeping, make sure to take the current
             # timestamp so we can use it next iteration