Update dependency ember-test-selectors to v7 (#9170)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -110,7 +110,7 @@
     "ember-source": "5.9.0",
     "ember-svg-jar": "2.4.9",
     "ember-template-lint": "6.0.0",
-    "ember-test-selectors": "6.0.0",
+    "ember-test-selectors": "7.0.0",
     "ember-tooltips": "3.6.0",
     "ember-truth-helpers": "4.0.3",
     "ember-web-app": "5.0.1",