[Site Isolation] Update expected output for plugins-types-allows-youtube-plugin-replacement.html

[roberto-apple]

b412368

[Site Isolation] Update expected output for plugins-types-allows-youtube-plugin-replacement.html
https://bugs.webkit.org/show_bug.cgi?id=313851
rdar://176052705

Reviewed by Megan Gardner and Ryosuke Niwa.

The number of deprecation console messages differ between non-SI and SI configurations because the
youtube.com iframe navigation is canceled at different loading stages, producing different numbers of
about:blank documents that inherit and re-parse the parent CSP where each re-parse fires the deprecation
warning again. The current expected output only matches the non-SI case.

Since the test only needs to verify the plugin replacement iframe is created, suppress the console
messages from the output so both configurations pass.

Also update TestController.cpp's SI external URL blocking path to check dumpJSConsoleLogInStdErr. Without it
the "Blocked access" message leaks into test output under SI even when console messages are suppressed,
because this path writes directly to the output rather than going through the console pipeline.

* LayoutTests/platform/ios-site-isolation/TestExpectations:
* LayoutTests/platform/mac-site-isolation/TestExpectations:
* LayoutTests/security/contentSecurityPolicy/plugins-types-allows-youtube-plugin-replacement-expected.txt:
* LayoutTests/security/contentSecurityPolicy/plugins-types-allows-youtube-plugin-replacement.html:
* Tools/WebKitTestRunner/TestController.cpp:

Canonical link: https://commits.webkit.org/312554@main

00b2343

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	❌ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	✅ 🛠 gtk3-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
		✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🧪 vision-wk2	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv
	✅ 🛠 tv-sim
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 22a7814)

Details

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	🧪 wpe-wk2	🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	🧪 ios-wk2-wpt	🧪 api-mac-debug	✅ 🛠 gtk3-libwebrtc
	🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
		🧪 mac-wk2	🧪 gtk-wk2
	✅ 🛠 vision	🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🧪 vision-wk2	🧪 mac-intel-wk2
	✅ 🛠 tv
	✅ 🛠 tv-sim
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash 00b2343)

Details

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	❌ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	✅ 🛠 gtk3-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
		✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🧪 vision-wk2	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv
	✅ 🛠 tv-sim
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-commit-queue]

Committed 312554@main (b412368): https://commits.webkit.org/312554@main

Reviewed commits have been landed. Closing PR #64074 and removing active labels.