PMM-12888 Implemented new Patroni dashboard. (#1566)

* PMM-12888 Implemented new Patroni dashboard.

* Change dashboard UID to NULL.

Co-authored-by: Alex Demidoff <alexander.demidoff@percona.com>

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Co-authored-by: Roman Novikov <roma.novikov@percona.com>
Co-authored-by: Alex Demidoff <alexander.demidoff@percona.com>