Make integration tests reliable

[agualis]

We have too many flaky integration test runs due to different reasons:

• SDK multicall problems,
• dRPC logs handling issues,
• Network issues

Many tests are currently skipped. This ticket is about un-skipping them and making them much more reliable. Flaky errors should be a very unfrequent exception.

Alternative:
If we cannot fix them cause we cannot control the root causes, better to move them to another non-blocking test suite as they bring value when working locally (for example with handler refactors).