Provide custom messages for the no-restricted-globals ESLint rule, and refactor the .eslintrc files (PR 9868 follow-up)

Without providing useful (custom) error messages for the `no-restricted-globals` rule, see https://eslint.org/docs/rules/no-restricted-globals, it's quite likely that the rule will be incorrectly disabled rather than the required globals being imported as intended.

To reduced duplication of the `no-restricted-globals` rule in multiple `.eslintrc` files, it's instead moved to the top-level `.eslintrc` file and disabled as needed on a folder/file basis outside of `/src` and `/web`.

test/.eslintrc

@@ -7,4 +7,8 @@
     "node": true,
     "jasmine": true,
   },
+
+  "rules": {
+    "no-restricted-globals": "off",
+  },
 }