[smart_holder] Backport non-functional test changes from PR #5231#5258

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rwgk merged 1 commit intopybind:smart_holderfrom

rwgk:backport_bakein_test_changes_sh

Jul 22, 2024

Commits on Jul 22, 2024

Backport non-functional test_class_sh_*.cpp changes from PR #5213: 1. To avoid compiler warnings for unused code in the unnamed namespace. 2. To avoid clang-format changes.
rwgk
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