fix: configure default url templates (#10416)

# Which Problems Are Solved

Emails are still send only with URLs to login v1.

# How the Problems Are Solved

Add configuration for URLs as URL templates, so that links can point at
Login v2.

# Additional Changes

None

# Additional Context

Closes #10236

---------

Co-authored-by: Marco A. <marco@zitadel.com>

internal/command/user_v2_human.go

@@ -411,6 +411,10 @@ func (c *Commands) changeUserEmail(ctx context.Context, cmds []eventstore.Comman
 			if err != nil {
 				return cmds, code, err
 			}
+			if email.URLTemplate == "" {
+				email.URLTemplate = c.defaultEmailCodeURLTemplate(ctx)
+			}
+
 			cmds = append(cmds, user.NewHumanEmailCodeAddedEventV2(ctx, &wm.Aggregate().Aggregate, cryptoCode.Crypted, cryptoCode.Expiry, email.URLTemplate, email.ReturnCode, ""))
 			if email.ReturnCode {
 				code = &cryptoCode.Plain