Static dashboards release

Grafana revisions: InfluxDB revision 14, Prometheus revision 14, InfluxDB TDG revision 3, Prometheus TDG revision 3

Added

• Options to build static dashboards
• Runtime arena memory panel
• Vinyl tuple cache and level 0 memory panels

Changed

• Set default Prometheus job to tarantool
• Set default InfluxDB measurement to tarantool_http
• Use in-built $__rate_interval instead of user-defined $rate_time_range
• Use fill(null) in InfluxQL requests