[cmake] fix macOS compilation by forcing lz4 to be static (#4540)

Signed-off-by: crueter <crueter@eden-emu.dev>

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Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4540

CMakeModules/find/Findlz4.cmake

@@ -24,7 +24,7 @@ else()
 endif()
 
 if (lz4_FOUND AND NOT TARGET lz4::lz4)
-    if (TARGET LZ4::lz4_shared)
+    if (TARGET LZ4::lz4_shared AND NOT YUZU_STATIC_BUILD)
         add_library(lz4::lz4 ALIAS LZ4::lz4_shared)
     elseif (TARGET LZ4::lz4_static)
         add_library(lz4::lz4 ALIAS LZ4::lz4_static)