feat(vault): Remove database notice when setting credential type

This notice just generated noise, particuarlly in some of the sqltests.

internal/db/schema/migrations/oss/postgres/63/01_credential_vault_ssh_cert_library.up.sql

@@ -136,6 +136,7 @@ begin;
   comment on table credential_vault_ssh_cert_library is
     'credential_vault_ssh_cert_library a credential library that issues credentials from a vault ssh secret backend.';
 
+  -- Replaced in 82/07_vault_ssh_cert_default.up.sql
   create function default_ssh_certificate_credential_type() returns trigger
   as $$
   begin

internal/db/schema/migrations/oss/postgres/82/07_vault_ssh_cert_default.up.sql

@@ -0,0 +1,23 @@
+-- Copyright (c) HashiCorp, Inc.
+-- SPDX-License-Identifier: BUSL-1.1
+
+begin;
+  drop trigger  default_ssh_certificate_credential_type on credential_vault_ssh_cert_library;
+  drop function default_ssh_certificate_credential_type;
+
+  -- Replaces trigger in 63/01_credential_vault_ssh_cert_library.up.sql
+  create function default_ssh_certificate_credential_type() returns trigger
+  as $$
+  begin
+    if new.credential_type is distinct from 'ssh_certificate' then
+      new.credential_type = 'ssh_certificate';
+    end if;
+    return new;
+  end;
+  $$ language plpgsql;
+  comment on function default_ssh_certificate_credential_type is
+    'default_ssh_certificate_credential_type ensures the credential_type is set to ssh_certificate';
+
+  create trigger default_ssh_certificate_credential_type before insert on credential_vault_ssh_cert_library
+    for each row execute procedure default_ssh_certificate_credential_type();
+commit;