[rfsaliev]

This pull request makes improvements to logging resource management in the test suite for the Vamana dynamic index. The main change is the introduction of a scope guard to ensure that a locally-captured logging sink is properly removed before the associated vector goes out of scope, preventing potential resource leaks or invalid accesses.

Resource management improvements:

• Added #include "svs/lib/scopeguard.h" to dynamic_index_2.cpp to enable use of scope guards for automatic resource cleanup.
• In both the "Testing Graph Index" and "Dynamic MutableVamanaIndex Per-Index Logging Test" test cases in dynamic_index_2.cpp, wrapped the addition of global_callback_sink to the logger with a scope guard (svs::lib::make_scope_guard) to ensure the sink is removed from the logger's sinks vector when the test scope ends. [1] [2]