Add Min and Event Count Metrics To Prometheus (#10530)

* Added min and Events sensor types to prometheus

* Updated prometheus client and fixed invalid swith state

* Added metric to count number of times an automation is triggered

* Removed assumption that may not apply to everybody

* Fixed tests

* Updated requirements_test_all

* Fixed unit tests

tests/components/test_prometheus.py

@@ -30,4 +30,6 @@ def test_view(prometheus_client):  # pylint: disable=redefined-outer-name
     assert len(body) > 3  # At least two comment lines and a metric
     for line in body:
         if line:
-            assert line.startswith('# ') or line.startswith('process_')
+            assert line.startswith('# ') \
+                or line.startswith('process_') \
+                or line.startswith('python_info')