Adds ts-nocheck to the PnP file (#6183)

**What's the problem this PR addresses?**

The PnP file is fairly large; it seems that parsing it is difficult for
TypeScript on projects configured with `checkJs`, even if it doesn't
contain `// @ts-check`. Adding `// @ts-nocheck` to the file seemed to
improve the situation.

**How did you fix it?**

Adds `// @ts-nocheck` to the generated `.pnp.cjs` file.

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.yarn/versions/e6b664fe.yml

@@ -0,0 +1,27 @@
+releases:
+  "@yarnpkg/cli": patch
+  "@yarnpkg/plugin-pnp": patch
+  "@yarnpkg/pnp": patch
+
+declined:
+  - "@yarnpkg/plugin-compat"
+  - "@yarnpkg/plugin-constraints"
+  - "@yarnpkg/plugin-dlx"
+  - "@yarnpkg/plugin-essentials"
+  - "@yarnpkg/plugin-init"
+  - "@yarnpkg/plugin-interactive-tools"
+  - "@yarnpkg/plugin-nm"
+  - "@yarnpkg/plugin-npm-cli"
+  - "@yarnpkg/plugin-pack"
+  - "@yarnpkg/plugin-patch"
+  - "@yarnpkg/plugin-pnpm"
+  - "@yarnpkg/plugin-stage"
+  - "@yarnpkg/plugin-typescript"
+  - "@yarnpkg/plugin-version"
+  - "@yarnpkg/plugin-workspace-tools"
+  - "@yarnpkg/builder"
+  - "@yarnpkg/core"
+  - "@yarnpkg/doctor"
+  - "@yarnpkg/nm"
+  - "@yarnpkg/pnpify"
+  - "@yarnpkg/sdks"

packages/yarnpkg-pnp/rollup.config.js

@@ -99,6 +99,7 @@ export default defineConfig([
       file: `./sources/esm-loader/built-loader.js`,
       format: `esm`,
       generatedCode: `es2015`,
+      banner: `/* eslint-disable */\n// @ts-nocheck\n`,
     },
     plugins: [
       resolve({

packages/yarnpkg-pnp/sources/generatePnpScript.ts

@@ -10,6 +10,7 @@ export function generateLoader(shebang: string | null | undefined, loader: strin
   return [
     shebang ? `${shebang}\n` : ``,
     `/* eslint-disable */\n`,
+    `// @ts-nocheck\n`,
     `"use strict";\n`,
     `\n`,
     loader,