Fix md5 in FIPS mode

OpenSSL 3.0.0+ does not support EVP_MD_CTX_FLAG_NON_FIPS_ALLOW any longer.
In OpenSSL 1.1.1 the non FIPS allowed flag is context specific, while
in 3.0.0+ it is a different EVP_MD provider.

Resolves: rhbz#2050541

diff -up mariadb-10.5.13-downstream_modified/mysys_ssl/my_md5.cc.fips mariadb-10.5.13-downstream_modified/mysys_ssl/my_md5.cc
--- mariadb-10.5.13-downstream_modified/mysys_ssl/my_md5.cc.fips	2022-02-07 16:36:47.255131576 +0100
+++ mariadb-10.5.13-downstream_modified/mysys_ssl/my_md5.cc	2022-02-07 22:57:32.391002916 +0100
@@ -52,12 +52,15 @@ static void md5_result(EVP_MD_CTX *conte
 
 static void md5_init(EVP_MD_CTX *context)
 {
+  EVP_MD *md5;
+  md5 = EVP_MD_fetch(NULL, "MD5", "fips=no");
   EVP_MD_CTX_init(context);
 #ifdef EVP_MD_CTX_FLAG_NON_FIPS_ALLOW
   /* Ok to ignore FIPS: MD5 is not used for crypto here */
   EVP_MD_CTX_set_flags(context, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
 #endif
-  EVP_DigestInit_ex(context, EVP_md5(), NULL);
+  EVP_DigestInit_ex(context, md5, NULL);
+  EVP_MD_free(md5);
 }
 
 static void md5_input(EVP_MD_CTX *context, const uchar *buf, unsigned len)