chore: eslint perf improvements for test suite, make use of cascading for all eslint configs to minimize duplicative rule

test/dataloader/.eslintrc.cjs

@@ -0,0 +1,8 @@
+/** @type {import('eslint').Linter.Config} */
+module.exports = {
+  ignorePatterns: ['payload-types.ts'],
+  parserOptions: {
+    project: ['./tsconfig.eslint.json'],
+    tsconfigRootDir: __dirname,
+  },
+}

test/dataloader/tsconfig.eslint.json

@@ -0,0 +1,13 @@
+{
+  // extend your base config to share compilerOptions, etc
+  //"extends": "./tsconfig.json",
+  "compilerOptions": {
+    // ensure that nobody can accidentally use this config for a build
+    "noEmit": true,
+  },
+  "include": [
+    // whatever paths you intend to lint
+    "./**/*.ts",
+    "./**/*.tsx"
+  ],
+}