ed21559 authentication does not work with generic binary tarball installs

mariadb-admin and others fail when trying to use it with a user configured to use ed21559 authentication when using a generic tarball installation:

$ /usr/local/mysql/bin/mariadb-admin --host=127.0.0.1 --user=ed25519_user --password=secret ping

/usr/local/mysql/bin/mariadb-admin: connect to server at '127.0.0.1' failed

error: 'Plugin client_ed25519 could not be loaded: /usr/local/mysql/lib/plugin/client_ed25519.so: undefined symbol: gnutls_hash_output'

Funny enough though this fails with e.g. mariadb-admin, mariadb-dump, mariadb-backup but not when using the mariadb client binary itself.

How to reproduce:

• install from generic binary tarball
• create a user using IDENTIFIED VIA ed25519
• try to run mariadb-admin using that user