Support LeakSanitizer

[chenBright]

What problem does this PR solve?

Issue Number: resolve

Problem Summary:

What is changed and the side effects?

Changed:

Side effects:

• Performance effects:

• Breaking backward compatibility:

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Check List:

• Please make sure your changes are compilable.
• When providing us with a new feature, it is best to add related tests.
• Please follow Contributor Covenant Code of Conduct.

[Copilot]

Pull request overview

This PR improves compatibility with LeakSanitizer (LSan) by reducing real leaks and suppressing/avoiding expected “lifetime” allocations that would otherwise be reported at process exit, across both unit tests and long-lived runtime threads/singletons.

Changes:

• Fix/suppress numerous test leaks by adding missing cleanup, switching to RAII in tests, and annotating intentionally-leaky allocations.
• Adjust runtime components to avoid LSan false-positives (e.g., leak annotations in long-lived loops/threads; unpoison pooled objects before leak check).
• Minor lifecycle/concurrency cleanup (e.g., TimerThread stop idempotence; bthread TLS/span teardown ordering).

Reviewed changes

Copilot reviewed 35 out of 35 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/thread_key_unittest.cpp	Switches TLS test allocations toward RAII to avoid leak reports (but requires care with TLS destructors).
test/run_tests.sh	Enables leak detection in ASan options for test runs by default.
test/object_pool_unittest.cpp	Prevents intentional per-iteration new int leaks by retaining allocations for test lifetime.
test/iobuf_unittest.cpp	Returns acquired TLS blocks to avoid leaks in the unit test.
test/CMakeLists.txt	Avoids linking gperftools when ASan is enabled (ASan incompatibility).
test/BUILD.bazel	Marks an additional test as large to reduce flakiness/resource contention.
test/bthread_key_unittest.cpp	Uses RAII to ensure thread-allocated args are freed.
test/bthread_fd_unittest.cpp	Replaces raw owning pointers with std::unique_ptr for test metadata.
test/bthread_dispatcher_unittest.cpp	Adds finite poll timeouts and explicit cleanup of allocated resources/fds.
test/brpc_ssl_unittest.cpp	Frees OpenSSL objects (X509/SSL/SSL_CTX) to avoid test leaks.
test/brpc_socket_unittest.cpp	Adds leak annotations for intentionally leaked objects; fixes lifetime/self-destruction and buffer cleanup paths.
test/brpc_redis_unittest.cpp	Uses RAII for authenticator and command handlers to prevent test leaks.
test/brpc_redis_cluster_unittest.cpp	Makes command handlers owned by the test service instance (RAII) to avoid leaks.
test/brpc_protobuf_json_unittest.cpp	Replaces heap buffer with stack buffer to avoid a leak.
test/brpc_proto_unittest.cpp	Uses std::unique_ptr for dynamically created protobuf messages.
test/brpc_load_balancer_unittest.cpp	Avoids leaking user objects on non-created sockets; uses RAII for load balancer.
test/brpc_input_messenger_unittest.cpp	Frees per-thread buffers and deletes allocated client metadata.
test/brpc_http_rpc_protocol_unittest.cpp	Explicitly releases stream user data to avoid leaking request objects.
test/brpc_event_dispatcher_unittest.cpp	Adds destructor cleanup and explicit socket/metadata teardown to prevent leaks.
test/brpc_alpn_protocol_unittest.cpp	Frees SSL/SSL_CTX objects in ALPN helper to avoid leaks.
src/butil/object_pool_inl.h	Registers an atexit hook to unpoison pooled objects so LSan can correctly see reachability.
src/butil/memory/singleton.h	Removes LSan leak-annotation behavior from Singleton creation paths.
src/butil/logging.cc	Annotates async logging enqueue path to suppress expected long-lived allocations under LSan.
src/butil/lazy_instance.h	Removes an unused include, keeping leak annotations available.
src/butil/find_cstr.h	Annotates thread-local string cache allocations as intentional non-leaks.
src/butil/debug/leak_annotations.h	Refines LSan API surface and adds explicit disable/enable macros.
src/bthread/timer_thread.cpp	Makes stop_and_join() idempotent via atomic exchange.
src/bthread/task_group.cpp	Reorders span cleanup before keytable cleanup to prevent re-populating TLS and leaking.
src/brpc/span.cpp	Adjusts span submission allocation behavior (now unconditional allocation).
src/brpc/socket_map.cpp	Adds scoped leak annotations in long-lived watch loop to avoid LSan noise.
src/brpc/server.cpp	Removes nothrow on builtin service allocations; fixes builtin-service ownership on Add failure; scopes leak annotation for intentional leaks.
src/brpc/rdma/block_pool.cpp	Deletes per-bucket mutexes and other globals in pool teardown to prevent leaks.
src/brpc/global.cpp	Uses explicit LSan disable/enable around long-lived object construction and scoped suppression around periodic enumeration.
src/brpc/controller.cpp	Clears _span earlier during controller reset to reduce retained references.
.github/workflows/ci-linux.yml	Enables with_bthread_tracer define in Bazel CI invocation.

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[wwbmmm]

LGTM