cherry-pick(release-1.12): fix default export breaking on installation tests (#7336)

PR #7331 SHA 0af1f43

Co-authored-by: Joel Einbinder <[email protected]>

Author: aslushnikov

packages/playwright-test/index.mjs

@@ -25,4 +25,4 @@ export const errors = playwright.errors;
 export const _electron = playwright._electron;
 export const _android = playwright._android;
 export const test = playwright.test;
-export default playwright.default;
+export default playwright.test;