Fix flaky testcontainers-based integration tests

[sklarsa]

See this test run:
https://github.com/questdb/go-questdb-client/actions/runs/10168945531

Tests failed because:

     integration_test.go:427: 
        	Error Trace:	/home/runner/work/go-questdb-client/go-questdb-client/integration_test.go:427
        	Error:      	Received unexpected error:
        	            	Error response from daemon: network with name test-network-v3 already exists: failed to create network
        	Test:       	TestIntegrationSuite/TestE2EValidWrites/all_column_types:_tcp

This should be fixable somehow, perhaps with a testcontainers setting