ARM OpenSSL DLLs for Windows are not found due to missing suffix

When building ARM64 OpenSSL binaries using the "VC-WIN32-ARM" or "VC-WIN64-ARM" platform in OpenSSL, the resulting binaries have -arm and -arm64 suffixes. However, Qt only knows about the -x64 suffix, so it incorrectly assumes that ARM builds use no suffix and cannot find the OpenSSL DLLs with their default names.

See https://github.com/openssl/openssl/blob/13a574d8bb2523181f8150de49bc041c9841f59d/Configurations/50-win-onecore.conf#L82 for the "-arm64" suffix and https://github.com/openssl/openssl/blob/13a574d8bb2523181f8150de49bc041c9841f59d/Configurations/50-win-onecore.conf#L73 for the "-arm" suffix.