Replace externals with Conan (#3735)

* Remove git submodules that will be loaded through conan

* Move custom Find modules to their own folder

* Use conan for downloading missing external dependencies

* CI: Change the yuzu source folder user to the user that the containers run on

* Attempt to remove dirty mingw build hack

* Install conan on the msvc build

* Only set release build type when using not using multi config generator

* Re-add qt bundled to workaround an issue with conan qt not downloading prebuilt binaries

* Add workaround for submodules that use legacy CMAKE variables

* Re-add USE_BUNDLED_QT on the msvc build bot

externals/find-modules/FindLibzip.cmake

@@ -0,0 +1,69 @@
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_LIBZIP QUIET libzip)
+
+find_path(LIBZIP_INCLUDE_DIR
+  NAMES zip.h
+  PATHS ${PC_LIBZIP_INCLUDE_DIRS}
+  "$ENV{LIB_DIR}/include"
+  "$ENV{INCLUDE}"
+  /usr/local/include
+  /usr/include
+)
+find_path(LIBZIP_INCLUDE_DIR_ZIPCONF
+  NAMES zipconf.h
+  HINTS ${PC_LIBZIP_INCLUDE_DIRS}
+  "$ENV{LIB_DIR}/include"
+  "$ENV{LIB_DIR}/lib/libzip/include"
+  "$ENV{LIB}/lib/libzip/include"
+  /usr/local/lib/libzip/include
+  /usr/lib/libzip/include
+  /usr/local/include
+  /usr/include
+  "$ENV{INCLUDE}"
+)
+find_library(LIBZIP_LIBRARY
+  NAMES zip
+  PATHS ${PC_LIBZIP_LIBRARY_DIRS}
+  "$ENV{LIB_DIR}/lib" "$ENV{LIB}" /usr/local/lib /usr/lib
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Libzip
+  FOUND_VAR LIBZIP_FOUND
+  REQUIRED_VARS
+    LIBZIP_LIBRARY
+    LIBZIP_INCLUDE_DIR
+    LIBZIP_INCLUDE_DIR_ZIPCONF
+)
+
+set(LIBZIP_VERSION 0)
+
+if (LIBZIP_INCLUDE_DIR_ZIPCONF)
+  FILE(READ "${LIBZIP_INCLUDE_DIR_ZIPCONF}/zipconf.h" _LIBZIP_VERSION_CONTENTS)
+  if (_LIBZIP_VERSION_CONTENTS)
+    STRING(REGEX REPLACE ".*#define LIBZIP_VERSION \"([0-9.]+)\".*" "\\1" LIBZIP_VERSION "${_LIBZIP_VERSION_CONTENTS}")
+  endif()
+endif()
+
+set(LIBZIP_VERSION ${LIBZIP_VERSION} CACHE STRING "Version number of libzip")
+
+if(LIBZIP_FOUND)
+  set(LIBZIP_LIBRARIES ${LIBZIP_LIBRARY})
+  set(LIBZIP_INCLUDE_DIRS ${LIBZIP_INCLUDE_DIR})
+  set(LIBZIP_DEFINITIONS ${PC_LIBZIP_CFLAGS_OTHER})
+endif()
+
+if(LIBZIP_FOUND AND NOT TARGET libzip::libzip)
+  add_library(libzip::libzip UNKNOWN IMPORTED)
+  set_target_properties(libzip::libzip PROPERTIES
+    IMPORTED_LOCATION "${LIBZIP_LIBRARY}"
+    INTERFACE_COMPILE_OPTIONS "${PC_LIBZIP_CFLAGS_OTHER}"
+    INTERFACE_INCLUDE_DIRECTORIES "${LIBZIP_INCLUDE_DIR}"
+  )
+endif()
+
+mark_as_advanced(
+    LIBZIP_INCLUDE_DIR
+    LIBZIP_LIBRARY
+)