PYTHON-3822 Add SRV test with uppercase hostname (#1423)

Author: ShaneHarvey

test/srv_seedlist/replica-set/uri-with-uppercase-hostname.json

@@ -0,0 +1,16 @@
+{
+  "uri": "mongodb+srv://TEST1.TEST.BUILD.10GEN.CC",
+  "seeds": [
+    "localhost.test.build.10gen.cc:27017",
+    "localhost.test.build.10gen.cc:27018"
+  ],
+  "hosts": [
+    "localhost:27017",
+    "localhost:27018",
+    "localhost:27019"
+  ],
+  "options": {
+    "ssl": true
+  },
+  "ping": true
+}