move typedefs for WOLFSSL_CRYPTO_EX_*() from wolfssl/openssl/compat_types.h to wolfssl/wolfcrypt/types.h, grouped with the other EX_DATA-related typedefs, as they are needed whenever defined(HAVE_EX_DATA) regardless of openssl compatness;
properly gate wolfSSL_CTX_get_ex_new_index() and wolfSSL_X509_get_ex_new_index() prototypes on defined(HAVE_EX_DATA).