PMM-13385 Pull ova box from s3 instead of vagrant cloud. (#3210) #13031

Job	Run time
Tests (mysql:5.6, mongo:4.2, postgres:10, percona/pmm-server:2.0.0)	6m 38s
Tests (mysql:5.7, mongo:4.4, postgres:11, percona/pmm-server:2.0.1)	6m 21s
Tests (mysql:8.0, mongo:4.4, postgres:12, percona/pmm-server:2.1.0)	6m 23s
Tests (mysql:8.0, mongo:4.4, postgres:13, percona/pmm-server:2.2.0)	6m 22s
Tests (percona:5.6, percona/percona-server-mongodb:4.2, perconalab/percona-distribution-postgresq...	6m 42s
Tests (percona:5.7, percona/percona-server-mongodb:4.4, perconalab/percona-distribution-postgresq...	6m 38s
Tests (percona:8.0, percona/percona-server-mongodb:4.4, perconalab/percona-distribution-postgresq...	6m 39s
Tests (mariadb:10.2, mongo:4.4, postgres:9.4, perconalab/pmm-server:dev-latest)	6m 30s
Tests (mariadb:10.3, percona/percona-server-mongodb:4.4, postgres:9.5, perconalab/pmm-server:dev-...	6m 33s
Tests (mariadb:10.4, postgres:9.6, perconalab/pmm-server:dev-latest)	6m 41s
	1h 5m 27s

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