fix ScyllaCloudConfigTests for python 3.12

[dkropachev]

ScyllaCloudConfigTests are failing due to the get_cluster_info returned empty list.
It fails with following error:

2025-01-04 23:20:21.023 DEBUG [test_scylla_cloud:37]: cqlsh 'select JSON host_id,broadcast_address,data_center from system.local' returned stderr: /home/runner/.ccm/scylla-repository/release/6.2.2/python3/bin/../libexec/python3.12.bin: symbol lookup error: /lib/x86_64-linux-gnu/libpthread.so.0: undefined symbol: __libc_pthread_init, version GLIBC_PRIVATE

I have tested it against 3.12.1, 3.12.6, 3.12.7 and 3.12.8, in all cases it fails with the same error.
It looks like problem of how python is packaged and I don't have this issue locally.
Workaround would be to avoid using cqlsh and use driver instead to read cluster nodes info.

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