Add tsan annotation for atomic_thread_fence

[tavplubix]

Thread sanitizer does not support atomic_thread_fence with release/acquire order, so using of atomic_thread_fence(MEMORY_ORDER_ACQUIRE) in RefCounted::dec_ref() causes false positive reports like this: https://gist.github.com/alesapin/96b14caa274a291f12dcf84cddc8ff5c

Explicit annotation avoids such false positives.

[tavplubix]

Btw, there is another data race which doesn't look false positive: https://gist.github.com/alesapin/bcb6ad9cd99e0c2e198ea4348db38145
I've fixed it with std::shared_ptr in our fork (ClickHouse@9cbc1a8), but I'm not familiar with internals of the library, so there must be a better way to fix it.

[mpenick]

Thanks. I'm running it through CI. Could you run a make format (that breaks our build)?