fix(webkit): do not report blob: URLs to route handlers

[Mohan Ram (mohanram-dev)]

Fixes #42727.

Description

In WebKit, blob: URLs were being dispatched to page.route handlers, whereas Chromium and Firefox do not dispatch network interception for blob: URLs.

In wkPage.ts and wvPage.ts, _onRequestWillBeSent already filters out data: and about: URLs, but did not exclude blob: URLs. When event.request.url.startsWith('blob:') is skipped in _onRequestWillBeSent, any subsequent requestIntercepted event continues cleanly without invoking route handlers or page.on('request').

Changes

• In packages/playwright-core/src/server/webkit/wkPage.ts: return early in _onRequestWillBeSent if event.request.url.startsWith('blob:').
• In packages/playwright-core/src/server/webkit/webview/wvPage.ts: return early in _onRequestWillBeSent if event.request.url.startsWith('blob:').
• In tests/page/page-route.spec.ts: add regression test validating that blob: URLs from web workers and fetch() are not reported to route handlers.