[Python] Re-enable all metric types in the loader

glean-core/python/glean/_loader.py

@@ -26,7 +26,21 @@ from . import metrics
 # A mapping from the name of the metric type as it appears in the metrics.yaml
 # to the Python class for that metric type.
 _TYPE_MAPPING = {
+    "boolean": metrics.BooleanMetricType,
     "counter": metrics.CounterMetricType,
+    "datetime": metrics.DatetimeMetricType,
+    "event": metrics.EventMetricType,
+    "labeled_boolean": metrics.LabeledBooleanMetricType,
+    "labeled_counter": metrics.LabeledCounterMetricType,
+    "labeled_string": metrics.LabeledStringMetricType,
+    "memory_distribution": metrics.MemoryDistributionMetricType,
+    "ping": metrics.PingType,
+    "string": metrics.StringMetricType,
+    "string_list": metrics.StringListMetricType,
+    "timespan": metrics.TimespanMetricType,
+    "timing_distribution": metrics.TimingDistributionMetricType,
+    "uuid": metrics.UuidMetricType,
+    "quantity": metrics.QuantityMetricType,
 }