Reduce nesting depth in tests to respect server CQL limit #1133

Job	Run time
Test wheels building / Build source distribution	11s
Test wheels building / Prepare matrix to run for 3.13 on `linux,macos-x86,macos-arm,windows,linux-aarch64`	3s
Test wheels building / Build wheels for windows on windows-2022	47m 5s
Test wheels building / Build wheels for linux-aarch64 on ubuntu-24.04-arm	15m 15s
Test wheels building / Build wheels for linux on ubuntu-24.04	14m 42s
Test wheels building / Build wheels for macos-x86 on macos-15-intel	34m 7s
Test wheels building / Build wheels for macos-arm on macos-14	11m 7s
	2h 2m 30s

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