[Stats] Make metrics report time configurable (#10036)

* Done.

* Lint.

* Address code review.

* Address code review.

* Remove wrong commit.

* Fix a test error.

python/ray/includes/ray_config.pxd

@@ -90,3 +90,5 @@ cdef extern from "ray/common/ray_config.h" nogil:
         c_bool put_small_object_in_memory_store() const
 
         uint32_t max_tasks_in_flight_per_worker() const
+
+        uint64_t metrics_report_interval_ms() const

python/ray/includes/ray_config.pxi

@@ -165,3 +165,7 @@ cdef class Config:
     @staticmethod
     def max_tasks_in_flight_per_worker():
         return RayConfig.instance().max_tasks_in_flight_per_worker()
+
+    @staticmethod
+    def metrics_report_interval_ms():
+        return RayConfig.instance().metrics_report_interval_ms()