Add preset for man_made=clarifier (#1091)

data/presets/man_made/clarifier.json

@@ -0,0 +1,16 @@
+{
+    "icon": "temaki-waste",
+    "geometry": [
+        "point",
+        "area"
+    ],
+    "tags": {
+        "man_made": "clarifier"
+    },
+    "addTags": {
+        "man_made": "clarifier",
+        "natural": "water",
+        "water": "wastewater"
+    },
+    "name": "Wastewater Clarifier"
+}