Update to eslint-plugin-matrix-org 0.8 (#23825)

* Update to eslint-plugin-matrix-org 0.8

* Exclude some eslint rules for specs

* Fix eslint tests path

.eslintrc.js

@@ -72,5 +72,14 @@ module.exports = {
                 }],
             }],
         },
+    }, {
+        files: [
+            "test/**/*.{ts,tsx}",
+        ],
+        rules: {
+            // We don't need super strict typing in test utilities
+            "@typescript-eslint/explicit-function-return-type": "off",
+            "@typescript-eslint/explicit-member-accessibility": "off",
+        },
     }],
 };