[AutoFill Debugging] Add form elements and more text form control DOM attributes

[whsieh]

f17dbea

[AutoFill Debugging] Add form elements and more text form control DOM attributes
https://bugs.webkit.org/show_bug.cgi?id=304508
rdar://166750217

Reviewed by Aditya Keerthi.

Add several new DOM attributes to the text extraction output on text fields:

- `pattern`
- `minlength`
- `maxlength`
- `name`

...and also introduce a new container type, `form`, which represents a `form` element with
attributes:

- `name`
- `autocomplete`

* LayoutTests/fast/text-extraction/debug-text-extraction-form-controls-expected.txt:
* LayoutTests/fast/text-extraction/debug-text-extraction-form-controls.html:

Augment an existing test to include a new `form` that contains a few text fields.

* Source/WebCore/page/text-extraction/TextExtraction.cpp:
(WebCore::TextExtraction::extractItemData):
* Source/WebCore/page/text-extraction/TextExtractionTypes.h:
* Source/WebKit/Shared/TextExtractionToStringConversion.cpp:
(WebKit::addPartsForItem):
(WebKit::addTextRepresentationRecursive):

Drive-by fix: address an issue where a single text child node can be incorrectly flagged as
"redundant with the HREF" in the case where the client has opted out of including URLs. I spotted
this while looking through the augmented layout test's HTML text representation above, since the
anchor tags were just getting surfaced as `<a>` with no text or href.

* Source/WebKit/Shared/WebCoreArgumentCoders.serialization.in:
* Source/WebKit/UIProcess/API/Cocoa/_WKTextExtraction.swift:
* Source/WebKit/UIProcess/API/Cocoa/_WKTextExtractionInternal.h:
* Source/WebKit/UIProcess/Cocoa/TextExtraction/WKTextExtractionUtilities.mm:
(WebKit::createItemWithChildren):
* Tools/WebKitTestRunner/cocoa/WKTextExtractionTestingHelpers.mm:
(WTR::buildDescriptionIgnoringChildren):

Canonical link: https://commits.webkit.org/304785@main

9eac033

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	✅ 🛠 wpe-cairo-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on previous version of this PR (hash c253608)

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	✅ 🛠 wpe-cairo-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash 9eac033)

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	✅ 🛠 wpe-cairo-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

[whsieh]

Thanks for the review!

[webkit-commit-queue]

Committed 304785@main (f17dbea): https://commits.webkit.org/304785@main

Reviewed commits have been landed. Closing PR #55716 and removing active labels.