Support LSan in UT

[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 aims to make the unit-test suite LeakSanitizer-friendly by eliminating real leaks in tests, adding targeted leak annotations for intentional process-lifetime allocations, and introducing an LSan suppressions file for unavoidable third‑party allocations.

Changes:

• Fixes multiple unit-test leaks by tightening ownership/lifetimes (e.g., RAII with unique_ptr, freeing buffers, releasing TLS blocks, deleting test-created objects).
• Adds LSan/ASan configuration for test runs (LSAN_OPTIONS + ASAN_OPTIONS) and introduces test/lsan_suppressions.txt.
• Adds/adjusts LSan leak-annotation usage in core runtime paths (logging, thread-local caches, long-lived bthreads) and cleans up RDMA block pool teardown.

Reviewed changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
test/thread_key_unittest.cpp	Keeps per-key data owned in the test to avoid LSan-reported leaks when keys are deleted.
test/run_tests.sh	Enables leak detection and points LSan at the suppressions file for UT runs.
test/object_pool_unittest.cpp	Avoids leaking new int allocations by freeing outside the timed region.
test/lsan_suppressions.txt	Adds suppressions for known third-party, process-lifetime allocations (gperftools).
test/iobuf_unittest.cpp	Releases acquired TLS block back to TLS to avoid leaking it.
test/CMakeLists.txt	Copies the LSan suppressions file into the test binary directory.
test/bthread_dispatcher_unittest.cpp	Ensures epoll thread can exit and frees/cleans up allocated test resources.
test/brpc_socket_unittest.cpp	Marks intentional leaks, fixes self-destruction behavior, and frees buffers on exit paths.
test/brpc_redis_unittest.cpp	Uses RAII for handlers/authenticator to prevent leaks in Redis UT.
test/brpc_redis_cluster_unittest.cpp	Makes RedisService handler ownership explicit via unique_ptr members.
test/brpc_protobuf_json_unittest.cpp	Replaces heap allocation with stack buffer to avoid a leak.
test/brpc_proto_unittest.cpp	Uses unique_ptr for dynamically allocated protobuf Message.
test/brpc_load_balancer_unittest.cpp	Avoids leaking SocketOptions.user and deletes a heap-allocated load balancer.
test/brpc_input_messenger_unittest.cpp	Frees per-thread buffers and deletes allocated client metadata.
test/brpc_event_dispatcher_unittest.cpp	Adds cleanup for socket user buffers and releases per-client allocations.
src/butil/logging.cc	Reduces retained string capacity under ASan and annotates async logging path for LSan.
src/butil/lazy_instance.h	Removes an include dependency while keeping leak annotations available.
src/butil/find_cstr.h	Annotates thread-local cache allocations to avoid false-positive leak reports.
src/butil/debug/leak_annotations.h	Adds explicit disable/enable helpers and updates the annotation interface.
src/brpc/socket_map.cpp	Adds leak-annotation usage in WatchConnections and documents intent.
src/brpc/server.cpp	Narrows scoped leak annotation to the intended initialization region.
src/brpc/rdma/block_pool.cpp	Frees mutexes and other globals during RDMA block pool destruction.
src/brpc/global.cpp	Disables LSan only around intentional process-lifetime constructions in GlobalUpdate.
.github/workflows/ci-linux.yml	Adjusts Bazel test defines used in CI.

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