Use mirror_rosetta user in rosetta integration test

[xin-hedera]

Problem

Follow the common pattern in other modules, we should use the same db user mirror_rosetta with readonly permissions in rosetta integration test as in production deployments.

Solution

• change rosetta integration test to use mirror_rosetta user, need to randomize mirror_rosetta password during setup to avoid security scan complaints
• use mirror_node to delete data in integration test where applicable

Alternatives

No response