Bug 245846 – Fix warnings in curl backend

• Status: NEW
• Component: Platform

[Don Olmstead]

Clang 15 is reporting warnings in the code

C:/GitHub/WebKit/Source/WebKit/NetworkProcess/curl/WebSocketTaskCurl.cpp:158:17: error: enumeration values 'OpCodeContinuation', 'OpCodePong', and 'OpCodeInvalid' not handled in switch [-Werror,-Wswitch]
        switch (opCode) {
                ^~~~~~
C:/GitHub/WebKit/Source/WebKit/NetworkProcess/curl/NetworkDataTaskCurl.cpp:375:138: error: lambda capture 'isCrossOrigin' is not used [-Werror,-Wunused-lambda-capture]
    m_client->willPerformHTTPRedirection(WTFMove(response), WTFMove(request), [this, protectedThis = Ref { *this }, didChangeCredential, isCrossOrigin](const ResourceRequest& newRequest) {
                                                                                                                                       ~~^~~~~~~~~~~~~

Also check MSVC so we can turn warnings as errors on for WinCairo and PlayStation.

[Radar WebKit Bug Importer]

<rdar://problem/100867914>