Fix clang build warning in WebSocketTaskCurl

[kshukuwa]

f10eb92

Fix clang build warning in WebSocketTaskCurl
https://bugs.webkit.org/show_bug.cgi?id=246847

Reviewed by Fujii Hironori.

A warning 'not handled in switch' is detected in WebSocketTask::didReceiveData()
due to 'OpCodeContinuation', 'OpCodePong' and 'OpCodeInvalid'. To solve the warning,
add those enum definitions.

* Source/WebKit/NetworkProcess/curl/WebSocketTaskCurl.cpp:
(WebKit::WebSocketTask::didReceiveData):

Canonical link: https://commits.webkit.org/255904@main

cf37457

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe
	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	🧪 gtk-wk2
	✅ 🧪 api-ios	🧪 api-mac	🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk1
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2
✅ 🛠 🧪 merge	✅ 🛠 watch	🧪 mac-AS-debug-wk2
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress

[webkit-early-warning-system]

EWS run on current version of this PR (hash cf37457)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe
	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	🧪 gtk-wk2
	✅ 🧪 api-ios	🧪 api-mac	🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk1
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2
✅ 🛠 🧪 merge	✅ 🛠 watch	🧪 mac-AS-debug-wk2
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress

[webkit-commit-queue]

Committed 255904@main (f10eb92): https://commits.webkit.org/255904@main

Reviewed commits have been landed. Closing PR #5693 and removing active labels.