Two problems with auth_parsec.so

1. it links with ${SSL_LIBRARIES}, in WolfSSL builds it's a static
   library, so when a plugin is loaded there will be two copies of
   wolfssl in the same address space. It breaks odr (at least).
2. Plugin can linked with OpenSSL and the server with WolfSSL or
   vice versa. It might load, but then we'll have both WolfSSL and
   OpenSSL at the same time. Kind of risky.

Fix: link the plugin statically into the server if it's a WolfSSL build

adjust tests to work with static and dynamic parsec

mysql-test/main/mysqld--help.test

@@ -42,7 +42,7 @@ perl;
               wsrep file-key-management cracklib-password-check user-variables
               provider-bzip2 provider-lzma provider-lzo
               thread-pool-groups thread-pool-queues thread-pool-stats
-              thread-pool-waits hashicorp provider gssapi/;
+              thread-pool-waits hashicorp provider gssapi parsec/;
 
   # And substitute the content some environment variables with their
   # names: