fix: drop bug of wal on mq, can't not drop runtime

[Rachelint]

Which issue does this PR close?

Closes #

Rationale for this change

Now, I found drop wal on mq may need to panic because dropping runtime in drop().
You can reproduce it using following cmd(need a kafka cluster):

RUST_BACKTRACE=1 cargo test --workspace --package wal --lib -- read_write::test_kafka_wal --ignored

The error message:

---- tests::read_write::test_kafka_wal stdout ----
thread 'tests::read_write::test_kafka_wal' panicked at 'Cannot start a runtime from within a runtime. This happens because a function (like `block_on`) attempted to block the current thread while the thread is being used to drive asynchronous tasks.', /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/runtime/thread_pool/mod.rs:89:25
stack backtrace:
   0: std::panicking::begin_panic
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/std/src/panicking.rs:616:12
   1: tokio::runtime::enter::enter
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/runtime/enter.rs:40:9
   2: tokio::runtime::thread_pool::ThreadPool::block_on
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/runtime/thread_pool/mod.rs:89:25
   3: tokio::runtime::Runtime::block_on
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/runtime/mod.rs:484:43
   4: common_util::runtime::Runtime::block_on
             at /Users/kamiu/Desktop/github/ceresdb/common_util/src/runtime/mod.rs:82:9
   5: <wal::message_queue_impl::namespace::Namespace<M> as core::ops::drop::Drop>::drop
             at ./src/message_queue_impl/namespace.rs:245:9
   6: core::ptr::drop_in_place<wal::message_queue_impl::namespace::Namespace<message_queue::kafka::kafka_impl::KafkaImpl>>
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/ptr/mod.rs:487:1
   7: core::ptr::drop_in_place<wal::message_queue_impl::wal::MessageQueueImpl<message_queue::kafka::kafka_impl::KafkaImpl>>
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/ptr/mod.rs:487:1
   8: core::ptr::drop_in_place<dyn wal::manager::WalManager>
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/ptr/mod.rs:487:1
   9: alloc::sync::Arc<T>::drop_slow
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/alloc/src/sync.rs:1105:18
  10: <alloc::sync::Arc<T> as core::ops::drop::Drop>::drop
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/alloc/src/sync.rs:1702:13
  11: core::ptr::drop_in_place<alloc::sync::Arc<dyn wal::manager::WalManager>>
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/ptr/mod.rs:487:1
  12: wal::tests::read_write::simple_read_write::{{closure}}
             at ./src/tests/read_write.rs:216:1
  13: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/future/mod.rs:91:19
  14: tokio::park::thread::CachedParkThread::block_on::{{closure}}
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/park/thread.rs:263:54
  15: tokio::coop::with_budget::{{closure}}
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/coop.rs:102:9
  16: std::thread::local::LocalKey<T>::try_with
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/std/src/thread/local.rs:445:16
  17: std::thread::local::LocalKey<T>::with
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/std/src/thread/local.rs:421:9
  18: tokio::coop::with_budget
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/coop.rs:95:5
  19: tokio::coop::budget
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/coop.rs:72:5
  20: tokio::park::thread::CachedParkThread::block_on
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/park/thread.rs:263:31
  21: tokio::runtime::enter::Enter::block_on
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/runtime/enter.rs:152:13
  22: tokio::runtime::thread_pool::ThreadPool::block_on
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/runtime/thread_pool/mod.rs:90:9
  23: tokio::runtime::Runtime::block_on
             at /Users/kamiu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.20.1/src/runtime/mod.rs:484:43
  24: common_util::runtime::Runtime::block_on
             at /Users/kamiu/Desktop/github/ceresdb/common_util/src/runtime/mod.rs:82:9
  25: wal::tests::read_write::test_simple_read_write_default_batch
             at ./src/tests/read_write.rs:79:5
  26: wal::tests::read_write::test_all
             at ./src/tests/read_write.rs:49:5
  27: wal::tests::read_write::test_kafka_wal
             at ./src/tests/read_write.rs:45:5
  28: wal::tests::read_write::test_kafka_wal::{{closure}}
             at ./src/tests/read_write.rs:42:1
  29: core::ops::function::FnOnce::call_once
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/ops/function.rs:248:5
  30: core::ops::function::FnOnce::call_once
             at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/ops/function.rs:248:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

What changes are included in this PR?

Fix above bug.

Are there any user-facing changes?

User should manually call close_gracefully now.

How does this change test

Test manually.

[jiacai2050]

Now, I found drop wal on mq may need to panic because dropping runtime in drop().

Could you paste panic stacktrace here?

Fix above bug.

How? Please explain in more details.

[Rachelint]

Now, I found drop wal on mq may need to panic because dropping runtime in drop().

Could you paste panic stacktrace here?

Fix above bug.

How? Please explain in more details.

I have added the reproducing way and the detail error.

[jiacai2050]

LGTM