[PATCH v3 0/4] MR4761: ntdll: Implement NtContinueEx()

[Dāvis Mosāns (davispuh) (＠davispuh)]

This MR implements `NtContinueEx(PCONTEXT, PCONTINUE_OPTIONS)` which was added in Windows 10 20H1.

Also added basic test reusing existing `test_continue()` (included from !4720)

League of Legends game hooks `NtContinue()` and `NtContinueEx()` by putting `jmp` instruction in front of it.

Note that LoL doesn't actually use `NtContinueEx()` itself and game will work fine without it but if game doesn't find `NtContinueEx()` it will permanently ban your account due to detecting "scripting program"

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  v3: ntdll/tests: Add basic test for NtContinueEx()
      ntdll: NtContinueEx() handle few error cases
      ntdll: Implement NtContinueEx()
      ntdll/tests: Implement test_continue() for amd64

https://gitlab.winehq.org/wine/wine/-/merge_requests/4761