ESLint: Add yarn lint:inspect command (#5309)

Uses @eslint/config-inspector to generate a report of our current ESLint
configuraton.

Author: watson

package.json

@@ -14,6 +14,7 @@
     "type:test": "cd docs && yarn && yarn test",
     "lint": "node scripts/check_licenses.js && eslint . --max-warnings 0 && yarn audit",
     "lint:fix": "node scripts/check_licenses.js && eslint . --max-warnings 0 --fix && yarn audit",
+    "lint:inspect": "npx @eslint/config-inspector@latest",
     "release:proposal": "node scripts/release/proposal",
     "services": "node ./scripts/install_plugin_modules && node packages/dd-trace/test/setup/services",
     "test": "SERVICES=* yarn services && mocha --expose-gc 'packages/dd-trace/test/setup/node.js' 'packages/*/test/**/*.spec.js'",