ddev phpmyadmin doesn't work with non-default ports

[rfay]

From slack

If ddev config global --router-https-port=8443 then

DDEV_DEBUG=true ddev phpmyadmin results in FULLURL https://test-phpmyadmin.ddev.site:8443:8037

Note 2 ports on the end.

It looks like we're assuming that DDEV_PRIMARY_URL doesn't have a port on the end.

ddev-phpmyadmin/commands/host/phpmyadmin

Lines 11 to 15 in fd1b2b7

	if [ ${DDEV_PRIMARY_URL%://*} = "http" ] || [ -n "${GITPOD_WORKSPACE_ID:-}" ] || [ "${CODESPACES:-}" = "true" ]; then
	ddev launch $DDEV_PRIMARY_URL:$DDEV_PHPMYADMIN_PORT
	else
	ddev launch $DDEV_PRIMARY_URL:$DDEV_PHPMYADMIN_HTTPS_PORT
	fi