fix(webview): send Target.setPauseOnStart earlier

[dcrousso]

upstream WebKit is able to send this as soon as Web Inspector is opened since that only happens when there is for sure something to inspect

as such, Web Inspector doesn't have to wait to receive a message in order to know that there is a target to receive this command

leverage Target.targetCreated as the likely first event from the inspected page to emulate this behavior

[github-actions]

Test results for "tests 2"

4 failed
❌ [firefox-page] › page/workers.spec.ts:40 › should emit created and destroyed events @tracing-firefox
❌ [firefox-page] › page/workers.spec.ts:40 › should emit created and destroyed events @firefox-macos-15-large
❌ [firefox-page] › page/workers.spec.ts:40 › should emit created and destroyed events @firefox-windows-latest
❌ [firefox-page] › page/workers.spec.ts:40 › should emit created and destroyed events @firefox-macos-15-xlarge

24 flaky

⚠️ [chromium-library] › library/chromium/chromium.spec.ts:177 › serviceWorker(), and fromServiceWorker() work `@tracing-chromium`
⚠️ [chromium-page] › page/page-request-continue.spec.ts:756 › propagate headers cross origin redirect after interception `@tracing-chromium`
⚠️ [chromium-library] › library/video.spec.ts:456 › screencast › should be 800x600 with null viewport `@msedge-dev-windows-latest`
⚠️ [chromium-library] › library/video.spec.ts:456 › screencast › should be 800x600 with null viewport `@chrome-ubuntu-22.04`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:299 › should report intercepted service worker requests in HAR `@msedge-windows-latest`
⚠️ [chromium-library] › library/video.spec.ts:456 › screencast › should be 800x600 with null viewport `@msedge-windows-latest`
⚠️ [chromium-page] › page/page-keyboard.spec.ts:202 › should press plus `@msedge-windows-latest`
⚠️ [chromium-library] › library/browsertype-connect.spec.ts:117 › launchServer › should print HTTP error `@chromium-macos-15-large`
⚠️ [chromium-library] › library/global-fetch-cookie.spec.ts:277 › should override cookie from Set-Cookie header even if it expired `@chromium-macos-15-large`
⚠️ [chromium-library] › library/heap.spec.ts:203 › cycle handles `@chromium-macos-15-large`
⚠️ [chromium-library] › library/chromium/oopif.spec.ts:150 › should take screenshot `@chromium-macos-15-xlarge`
⚠️ [chromium-library] › library/video.spec.ts:456 › screencast › should be 800x600 with null viewport `@chrome-windows-latest`
⚠️ [chromium-library] › library/video.spec.ts:456 › screencast › should be 800x600 with null viewport `@chrome-beta-ubuntu-22.04`
⚠️ [chromium-page] › page/page-request-continue.spec.ts:756 › propagate headers cross origin redirect after interception `@chrome-beta-ubuntu-22.04`
⚠️ [chromium-library] › library/browsertype-connect.spec.ts:141 › launchServer › should be able to reconnect to a browser `@chrome-macos-latest`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:177 › serviceWorker(), and fromServiceWorker() work `@chrome-macos-latest`
⚠️ [chromium-library] › library/video.spec.ts:456 › screencast › should be 800x600 with null viewport `@chrome-macos-latest`
⚠️ [firefox-page] › page/page-wait-for-function.spec.ts:43 › should poll on interval `@tracing-firefox`
⚠️ [firefox-library] › library/defaultbrowsercontext-2.spec.ts:180 › should have passed URL when launching with ignoreDefaultArgs: true `@firefox-macos-15-large`
⚠️ [firefox-library] › library/logger.spec.ts:34 › should log context-level `@firefox-macos-15-large`
⚠️ [firefox-library] › library/inspector/cli-codegen-3.spec.ts:224 › cli codegen › should generate frame locators (4) `@firefox-windows-latest`
⚠️ [webkit-library] › library/browsercontext-base-url.spec.ts:37 › should construct a new URL when a baseURL in browserType.launchPersistentContext is passed to page.goto `@tracing-webkit`
⚠️ [webkit-library] › library/browsertype-connect.spec.ts:792 › launchServer › should upload a folder `@webkit-macos-15-large`
⚠️ [webkit-page] › page/page-request-continue.spec.ts:194 › post data › should compute content-length from post data `@webkit-macos-15-large`

104519 passed, 4403 skipped

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Merge workflow run.

[dcrousso]

im gonna investigate the issue with tests/page/page-set-content.spec.ts:153:3 › should handle timeout properly 2 separately since i can reproduce that locally without these chanages

[github-actions]

Test results for "tests 1"

3 failed
❌ [chromium-library] › library/browsercontext-add-init-script.spec.ts:28 › should work without navigation, after all bindings @chromium-ubuntu-22.04-arm-node20
❌ [chromium-library] › library/browsercontext-expose-function.spec.ts:77 › should be callable from-inside addInitScript @chromium-ubuntu-22.04-arm-node20
❌ [firefox-page] › page/workers.spec.ts:40 › should emit created and destroyed events @firefox-ubuntu-22.04-node20

5 flaky

⚠️ [chromium-library] › library/video.spec.ts:645 › screencast › should capture full viewport `@frozen-time-library-chromium-linux`
⚠️ [chromium-library] › library/video.spec.ts:717 › screencast › should work with video+trace `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/video.spec.ts:680 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-node24`
⚠️ [playwright-test] › ui-mode-test-update.spec.ts:202 › should update test locations `@ubuntu-latest-node22`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:189 › should show snapshots for steps `@windows-latest-node22`

48924 passed, 1142 skipped

---

Merge workflow run.

[github-actions]

Test results for "MCP"

7380 passed, 1122 skipped

---

Merge workflow run.

[dcrousso]

test timeout fixed in #41416