[crypto] Atomize all traces of MbedTLS, and require OpenSSL 3+ (#3606)

Closes #3137
Closes #3465

- Replace all mbedtls usage with OpenSSL
- require OpenSSL
- Up OpenSSL version to 3, cuz that's what we actually need...

CAVEATS:
- httplib also now required
- other ssl backends for svc are unused, maybe remove later
  * To be fair, our CI never used them anyways. And we never tested those

TESTERS PLEASE TEST:
- All games and applets boot
- Boot, load, exit, etc. times

Co-authored-by: crueter <crueter@eden-emu.dev>
Signed-off-by: lizzie <lizzie@eden-emu.dev>
Co-authored-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3606
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: DraVee <dravee@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/yuzu/CMakeLists.txt

@@ -361,10 +361,6 @@ target_sources(yuzu
         ${LANGUAGES}
         ${THEMES})
 
-if (ENABLE_OPENSSL)
-    target_link_libraries(yuzu PRIVATE OpenSSL::SSL OpenSSL::Crypto)
-endif()
-
 if (APPLE)
     # Normal icns
     set(MACOSX_ICON "${CMAKE_SOURCE_DIR}/dist/eden.icns")
@@ -458,8 +454,6 @@ if (NOT MSVC AND (APPLE OR NOT YUZU_STATIC_BUILD))
 endif()
 
 # Remember that the linker is incredibly stupid.
-if (YUZU_STATIC_BUILD AND MINGW AND ARCHITECTURE_x86_64 AND ENABLE_OPENSSL)
-    target_link_libraries(yuzu PRIVATE OpenSSL::SSL OpenSSL::Crypto)
-endif()
+target_link_libraries(yuzu PRIVATE OpenSSL::SSL OpenSSL::Crypto)
 
 create_target_directory_groups(yuzu)