Fix playwright config merging for webServer property

[Ethan-Arrowood]

Fixes: #64352 (comment)

Closes NEXT-3238

[ijjk]

Failing test suites

Commit: acf8e53

TURBOPACK=1 pnpm test-start test/e2e/app-dir/actions-allowed-origins/app-action-allowed-origins.test.ts (turbopack)

• app-dir action allowed origins > should pass if localhost is set as a safe origin

Expand output

● app-dir action allowed origins › should pass if localhost is set as a safe origin

thrown: "Exceeded timeout of 60000 ms for a hook.
Add a timeout value to this test to increase the timeout, if this is a long-running test. See https://jestjs.io/docs/api#testname-fn-timeout."

  252 |   let next: NextInstance | undefined
  253 |   if (!skipped) {
> 254 |     beforeAll(async () => {
      |     ^
  255 |       next = await createNext(options)
  256 |     })
  257 |     afterAll(async () => {

  at beforeAll (lib/e2e-utils.ts:254:5)
  at e2e/app-dir/actions-allowed-origins/app-action-allowed-origins.test.ts:6:42
  at Object.describe (e2e/app-dir/actions-allowed-origins/app-action-allowed-origins.test.ts:5:1)

● Test suite failed to run

thrown: "Exceeded timeout of 60000 ms for a hook.
Add a timeout value to this test to increase the timeout, if this is a long-running test. See https://jestjs.io/docs/api#testname-fn-timeout."

  131 |
  132 | if (typeof afterAll === 'function') {
> 133 |   afterAll(async () => {
      |   ^
  134 |     if (nextInstance) {
  135 |       await nextInstance.destroy()
  136 |       throw new Error(

  at Object.afterAll (lib/e2e-utils.ts:133:3)
  at Object.<anonymous> (e2e/app-dir/actions-allowed-origins/app-action-allowed-origins.test.ts:5:19)

Read more about building and testing Next.js in contributing.md.

[ijjk]

Stats from current PR

Default Build

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js fix/playwright-config-merging	Change
buildDuration	17.3s	14.3s	N/A
buildDurationCached	7.9s	7.5s	N/A
nodeModulesSize	359 MB	359 MB	⚠️ +1.94 kB
nextStartRea..uration (ms)	392ms	396ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js fix/playwright-config-merging	Change
139-HASH.js gzip	31.8 kB	31.8 kB	N/A
2478adb-HASH.js gzip	53.5 kB	53.5 kB	N/A
4967-HASH.js gzip	5.1 kB	5.1 kB	N/A
6701.HASH.js gzip	168 B	168 B	✓
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main-HASH.js gzip	31.6 kB	31.6 kB	N/A
webpack-HASH.js gzip	1.65 kB	1.64 kB	N/A
Overall change	45.3 kB	45.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js fix/playwright-config-merging	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

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hooks-HASH.js gzip	391 B	390 B	N/A
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withRouter-HASH.js gzip	323 B	323 B	✓
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Client Build Manifests

	vercel/next.js canary	vercel/next.js fix/playwright-config-merging	Change
_buildManifest.js gzip	484 B	484 B	✓
Overall change	484 B	484 B	✓

Rendered Page Sizes

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index.html gzip	528 B	528 B	✓
link.html gzip	540 B	541 B	N/A
withRouter.html gzip	523 B	523 B	✓
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Edge SSR bundle Size

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edge-ssr.js gzip	94.6 kB	94.7 kB	N/A
page.js gzip	3.04 kB	3.05 kB	N/A
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Middleware size

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middleware-b..fest.js gzip	624 B	622 B	N/A
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middleware.js gzip	27.9 kB	27.9 kB	N/A
edge-runtime..pack.js gzip	839 B	839 B	✓
Overall change	839 B	839 B	✓

Next Runtimes

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app-page-tur..prod.js gzip	99.9 kB	99.9 kB	✓
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app-route-tu..prod.js gzip	14.9 kB	14.9 kB	✓
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app-route.ru..prod.js gzip	14.9 kB	14.9 kB	✓
pages-api-tu..prod.js gzip	9.55 kB	9.55 kB	✓
pages-api.ru...dev.js gzip	9.82 kB	9.82 kB	✓
pages-api.ru..prod.js gzip	9.55 kB	9.55 kB	✓
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pages.runtim...dev.js gzip	22.1 kB	22.1 kB	✓
pages.runtim..prod.js gzip	21.4 kB	21.4 kB	✓
server.runti..prod.js gzip	51.6 kB	51.6 kB	✓
Overall change	962 kB	962 kB	✓

build cache

	vercel/next.js canary	vercel/next.js fix/playwright-config-merging	Change
0.pack gzip	1.62 MB	1.61 MB	N/A
index.pack gzip	112 kB	112 kB	N/A
Overall change	0 B	0 B	✓

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Commit: acf8e53