chore: move ember-template-lint to devDependencies

Author: jamescdavis

package.json

@@ -39,7 +39,6 @@
     "broccoli-plugin": "^4.0.3",
     "common-tags": "^1.8.0",
     "ember-cli-babel-plugin-helpers": "^1.1.0",
-    "ember-template-lint": "^2.9.1",
     "fs-tree-diff": "^2.0.1",
     "hash-for-dep": "^1.5.1",
     "heimdalljs-logger": "^0.1.10",
@@ -78,6 +77,7 @@
     "ember-resolver": "^8.0.0",
     "ember-source": "~3.19.0",
     "ember-source-channel-url": "^2.0.1",
+    "ember-template-lint": "^2.9.1",
     "ember-try": "^1.4.0",
     "eslint": "^7.3.1",
     "eslint-config-prettier": "^6.11.0",