Fix declaration emit in --moduleResolution bundler using wrong exports conditions (#56265)

tests/cases/compiler/declarationEmitBundlerConditions.ts

@@ -0,0 +1,35 @@
+// @module: esnext
+// @moduleResolution: bundler
+// @declaration: true
+// @emitDeclarationOnly: true
+// @noTypesAndSymbols: true
+
+// @Filename: /node_modules/pkg/package.json
+{
+  "name": "pkg",
+  "type": "module",
+  "exports": {
+    ".": {
+      "import": "./index.js",
+      "require": "./index.cjs"
+    }
+  }
+}
+
+// @Filename: /node_modules/pkg/index.d.ts
+export declare class C {
+  private p;
+}
+
+// @Filename: /node_modules/pkg/index.d.cts
+export {};
+
+// @Filename: /makeC.ts
+import { C } from "pkg";
+export function makeC() {
+  return new C();
+}
+
+// @Filename: /index.ts
+import { makeC } from "./makeC";
+export const c = makeC();