FIX: Allow connector template names to be camelCase (#17371)

The default Ember resolver implementation allows this for components. We need the same for connectors (which are essentially components behind-the-scenes)

app/assets/javascripts/discourse/tests/unit/ember/resolver-test.js

@@ -480,7 +480,11 @@ module("Unit | Ember | resolver", function (hooks) {
   });
 
   test("resolves connector templates", function (assert) {
-    setTemplates(["javascripts/foo", "javascripts/connectors/foo-bar/baz_qux"]);
+    setTemplates([
+      "javascripts/foo",
+      "javascripts/connectors/foo-bar/baz_qux",
+      "javascripts/connectors/foo-bar/camelCase",
+    ]);
 
     lookupTemplate(
       assert,
@@ -502,6 +506,20 @@ module("Unit | Ember | resolver", function (hooks) {
       "javascripts/connectors/foo-bar/baz_qux",
       "underscores last segment"
     );
+
+    lookupTemplate(
+      assert,
+      "template:connectors/foo-bar/camelCase",
+      "javascripts/connectors/foo-bar/camelCase",
+      "handles camelcase file names"
+    );
+
+    lookupTemplate(
+      assert,
+      resolver.normalize("template:connectors/foo-bar/camelCase"),
+      "javascripts/connectors/foo-bar/camelCase",
+      "handles camelcase file names when normalized"
+    );
   });
 
   test("returns 'not_found' template when template name cannot be resolved", function (assert) {