CMake: Allow arm64 architecure in Windows

This also sets arm64 as processor architecture in exe manifest files.

CMakeLists.txt

@@ -132,6 +132,8 @@ if(WIN32)
 			set(WIRESHARK_TARGET_PLATFORM win64)
 		elseif($ENV{MSYSTEM_CARCH} MATCHES "i686")
 			set(WIRESHARK_TARGET_PLATFORM win32)
+		elseif($ENV{MSYSTEM_CARCH} MATCHES "aarch64")
+			set(WIRESHARK_TARGET_PLATFORM "win64arm")
 		else()
 			set(WIRESHARK_TARGET_PLATFORM "$ENV{MSYSTEM_CARCH}")
 		endif()
@@ -149,6 +151,8 @@ if(WIN32)
 	elseif(WIRESHARK_TARGET_PLATFORM MATCHES "win32")
 		message(FATAL_ERROR "Deprecated target platform ${WIRESHARK_TARGET_PLATFORM}. See https://gitlab.com/wireshark/wireshark/-/issues/17779 for details.")
 		set(WIRESHARK_TARGET_PROCESSOR_ARCHITECTURE x86)
+	elseif(WIRESHARK_TARGET_PLATFORM MATCHES "win64arm")
+		set(WIRESHARK_TARGET_PROCESSOR_ARCHITECTURE arm64)
 	else()
 		message(FATAL_ERROR "Invalid target platform: ${WIRESHARK_TARGET_PLATFORM}")
 	endif()